Merge pull request #238 from wanqing0421/main

fixed the error when insert particles from file with integer number

.gitignore

@@ -37,11 +37,15 @@
 *.out
 *.app
 
-# directories
+# Exclude specific directories wherever they appear
 build/**
 include/**
 bin/**
 lib/**
+**/build/
+**/include/
+**/bin/
+**/lib/
 test*/**
 **/**notnow
 doc/code-documentation/
@@ -61,3 +65,5 @@ doc/DTAGS
 **/[0-9]*.[0-9][0-9][0-9][0-9][0-9][0-9][0-9]
 **/[0-9]*.[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]
 **/VTK
+
+

DEMSystems/DEMSystem/DEMSystem.cpp

@@ -66,12 +66,13 @@ pFlow::uniquePtr<pFlow::DEMSystem>
 		word  demSystemName,
 		const std::vector<box>& domains, 
 		int argc, 
-		char* argv[]
+		char* argv[],
+		bool requireRVel
 		)
 {
 	if( wordvCtorSelector_.search(demSystemName) )
 	{
-		return wordvCtorSelector_[demSystemName] (demSystemName, domains, argc, argv);
+		return wordvCtorSelector_[demSystemName] (demSystemName, domains, argc, argv, requireRVel);
 	}
 	else
 	{

DEMSystems/DEMSystem/DEMSystem.hpp

@@ -71,13 +71,15 @@ public:
 			word  demSystemName,
 			const std::vector<box>& domains, 
 			int argc, 
-			char* argv[]
+			char* argv[],
+			bool requireRVel
 		),
 		(
 			demSystemName,
 			domains, 
 			argc, 
-			argv
+			argv,
+			requireRVel
 		));
 
 	realx3 g()const
@@ -96,7 +98,7 @@ public:
 		return Control_();
 	}
 
-	auto inline constexpr usingDoulle()const
+	auto inline constexpr usingDouble()const
 	{
 		return pFlow::usingDouble__;
 	}
@@ -119,7 +121,10 @@ public:
 	span<const int32> parIndexInDomain(int32 domIndx)const = 0;
 
 	virtual
-	span<real> diameter() = 0; 
+	span<real> diameter() = 0;
+	
+	virtual 
+	span<uint32> particleId() = 0;
 
 	virtual 
 	span<real> courseGrainFactor() = 0;
@@ -176,7 +181,8 @@ public:
 			word  demSystemName,
 			const std::vector<box>& domains, 
 			int argc, 
-			char* argv[]);
+			char* argv[],
+			bool requireRVel=false);
 
 };
 

DEMSystems/grainDEMSystem/grainDEMSystem.cpp

@@ -163,6 +163,12 @@ pFlow::grainDEMSystem::parIndexInDomain(int32 di)const
 	return particleDistribution_->particlesInDomain(di);
 }
 
+pFlow::span<pFlow::uint32> pFlow::grainDEMSystem::particleId()
+{
+	return span<uint32>(particleIdHost_.data(), particleIdHost_.size());
+}
+
+
 pFlow::span<pFlow::real> pFlow::grainDEMSystem::diameter() 
 {	
 	return span<real>(diameterHost_.data(), diameterHost_.size());
@@ -233,6 +239,7 @@ bool pFlow::grainDEMSystem::beforeIteration()
 	velocityHost_ = std::as_const(particles_()).velocity().hostView();
 	positionHost_ = std::as_const(particles_()).pointPosition().hostView();
 	diameterHost_ = particles_->diameter().hostView();
+	particleIdHost_ = particles_->particleId().hostView();
 
 	if(requireRVel_)
 		rVelocityHost_ = std::as_const(particles_()).rVelocity().hostView();

DEMSystems/grainDEMSystem/grainDEMSystem.hpp

@@ -63,6 +63,8 @@ protected:
 
 	ViewType1D<real, HostSpace> 	diameterHost_;
 
+	ViewType1D<uint32, HostSpace> 	particleIdHost_;
+
 	bool 							requireRVel_ = false;
 
 	ViewType1D<realx3, HostSpace> 	rVelocityHost_;
@@ -122,6 +124,8 @@ public:
 
 	span<const int32> parIndexInDomain(int32 di)const override;
 
+	span<uint32> particleId() override;
+
 	span<real> diameter() override;
 
 	span<real> courseGrainFactor() override;

DEMSystems/sphereDEMSystem/sphereDEMSystem.cpp

@@ -165,6 +165,11 @@ pFlow::sphereDEMSystem::parIndexInDomain(int32 di)const
 	return particleDistribution_->particlesInDomain(di);
 }
 
+pFlow::span<pFlow::uint32> pFlow::sphereDEMSystem::particleId()
+{
+    return span<uint32>();
+}
+
 pFlow::span<pFlow::real> pFlow::sphereDEMSystem::diameter() 
 {	
 	return span<real>(diameterHost_.data(), diameterHost_.size());
@@ -235,6 +240,7 @@ bool pFlow::sphereDEMSystem::beforeIteration()
 	velocityHost_ = std::as_const(particles_()).velocity().hostView();
 	positionHost_ = std::as_const(particles_()).pointPosition().hostView();
 	diameterHost_ = particles_->diameter().hostView();
+	particleIdHost_ = particles_->particleId().hostView();
 
 	if(requireRVel_)
 		rVelocityHost_ = std::as_const(particles_()).rVelocity().hostView();

DEMSystems/sphereDEMSystem/sphereDEMSystem.hpp

@@ -63,6 +63,8 @@ protected:
 
 	ViewType1D<real, HostSpace> 	diameterHost_;
 
+	ViewType1D<uint32, HostSpace> 	particleIdHost_;
+
 	bool 							requireRVel_ = false;
 
 	ViewType1D<realx3, HostSpace> 	rVelocityHost_;
@@ -122,6 +124,8 @@ public:
 
 	span<const int32> parIndexInDomain(int32 di)const override;
 
+	span<uint32> particleId() override;
+
 	span<real> diameter() override;
 
 	span<real> courseGrainFactor() override;

benchmarks/helicalMixer/caseSetup/particleInsertion

@@ -1,67 +0,0 @@
-/* -------------------------------*- C++ -*--------------------------------- *\ 
-|  phasicFlow File                                                            | 
-|  copyright: www.cemf.ir                                                     | 
-\* ------------------------------------------------------------------------- */ 
-
-objectName particleInsertion;
-objectType dicrionary;
-
-
-active  yes;          // is insertion active?
-
-collisionCheck No;   // not implemented for yes
-
-
-
-particleInlet1
-{
-   type		      boxRegion; // type of insertion region
-   rate 	         1000000;  // insertion rate (particles/s)
-   startTime 	   0;      // (s)
-   endTime   	   2.0;    // (s)
-   interval       0.05;  //s  
-
-   boxRegionInfo 
-   {
-   	min ( -0.17 0.23 0.46); // (m,m,m)
-   	max (  0.17 0.24 0.88); // (m,m,m)
-   }
-   
-   setFields
-   {
-     velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
-   }
-   
-   mixture
-   {
-      smallParticle 1; // mixture composition of inserted particles 
-      
-   }
-}
-
-particleInlet2
-{
-   type           boxRegion; // type of insertion region
-   rate           1000000;  // insertion rate (particles/s)
-   startTime      0;      // (s)
-   endTime        2.0;    // (s)
-   interval       0.05;  //s  
-
-   boxRegionInfo 
-   {
-      min ( -0.17 0.23 0.02); // (m,m,m)
-      max (  0.17 0.24 0.44); // (m,m,m)
-   }
-   
-   setFields
-   {
-     velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
-   }
-   
-   mixture
-   {
-      largeParticle 1; // mixture composition of inserted particles 
-      
-   }
-}
-

benchmarks/helicalMixer/caseSetup/sphereShape

@@ -1,11 +0,0 @@
-/* -------------------------------*- C++ -*--------------------------------- *\ 
-|  phasicFlow File                                                            | 
-|  copyright: www.cemf.ir                                                     | 
-\* ------------------------------------------------------------------------- */ 
-
-objectName 	sphereDict;
-objectType 	sphereShape;
-
-names 		(smallParticle largeParticle); 	// names of shapes 
-diameters 	(0.002 0.00201);				// diameter of shapes 
-materials	(glassMat glassMat);		// material names for shapes 

benchmarks/helicalMixer/helicalMixer_1m/caseSetup/interaction

@@ -2,18 +2,21 @@
 |  phasicFlow File                                                            | 
 |  copyright: www.cemf.ir                                                     | 
 \* ------------------------------------------------------------------------- */ 
-
 objectName interaction;
 objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
 
 materials   (glassMat wallMat); // a list of materials names
+
 densities   (2500.0 2500);      // density of materials [kg/m3]
 
 contactListType   sortedContactList;
 
 model
 {
-   contactForceModel nonLinearLimited;
+   contactForceModel    nonLinearLimited;
+   
    rollingFrictionModel normal;
 
    Yeff (1.0e6 1.0e6  // Young modulus [Pa]
@@ -28,9 +31,6 @@ model
    en (0.97  0.85   // coefficient of normal restitution
              1.00);
 
-   et (1.0   1.0    // coefficient of tangential restitution 
-             1.0);
-
    mu (0.65  0.65   // dynamic friction 
              0.65);
 
@@ -41,19 +41,13 @@ model
 
 contactSearch
 {
-   method         NBS;           
+    method         NBS;  
-   wallMapping    cellMapping;   
 
-   NBSInfo
+    updateInterval   10;
-   {
-      updateFrequency 10;        // each 20 timesteps, update neighbor list 
-      sizeRatio      1.1;       // bounding box size to particle diameter (max)
-   }
 
-   cellMappingInfo
+    sizeRatio       1.1;
-   {
-      updateFrequency 10;        // each 20 timesteps, update neighbor list  
-      cellExtent     0.6;        // bounding box for particle-wall search (> 0.5)
-   }
 
+    cellExtent     0.55;
+
+    adjustableBox   Yes;     
 }

benchmarks/helicalMixer/helicalMixer_1m/caseSetup/particleInsertion

@@ -0,0 +1,72 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particleInsertion;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+active  yes;          // is insertion active?
+
+particleInlet1
+{
+   regionType     box; // type of insertion region
+   
+   rate           250000;  // insertion rate (particles/s)
+   
+   timeControl    simulationTime;
+   
+   startTime      0;      // (s)
+   
+   endTime        2.0;    // (s)
+   
+   insertionInterval    0.05;  //s  
+
+   boxInfo 
+   {
+        min (-0.17 0.23 0.46); // (m,m,m)
+        max ( 0.17 0.24 0.88); // (m,m,m)
+   }
+   
+   setFields
+   {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+        smallParticle 1; // mixture composition of inserted particles 
+   }
+}
+
+particleInlet2
+{
+    regionType     box; // type of insertion region
+
+    rate           250000;  // insertion rate (particles/s)
+
+    timeControl    simulationTime;
+
+    startTime      0;      // (s)
+
+    endTime        2.0;    // (s)
+
+    insertionInterval    0.05;  //s  
+
+    boxInfo 
+    {
+        min ( -0.17 0.23 0.02); // (m,m,m)
+        max (  0.17 0.24 0.44); // (m,m,m)
+    }
+
+    setFields
+    {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+    }
+   
+   mixture
+   {
+        largeParticle 1; // mixture composition of inserted particles 
+   }
+}

benchmarks/helicalMixer/helicalMixer_1m/caseSetup/shapes

@@ -2,13 +2,11 @@
 |  phasicFlow File                                                            | 
 |  copyright: www.cemf.ir                                                     | 
 \* ------------------------------------------------------------------------- */ 
-objectName particleInsertion;
+objectName  shapes;
-objectType dicrionary;
+objectType  dictionary;
 fileFormat  ASCII;
 /*---------------------------------------------------------------------------*/
 
-active  no;          // is insertion active?
+names       (smallParticle largeParticle);  // names of shapes 
-
+diameters   (0.004 0.00401);                // diameter of shapes 
-collisionCheck No;   // not implemented for yes
+materials   (glassMat glassMat);            // material names for shapes 
-
-

benchmarks/helicalMixer/helicalMixer_1m/cleanThisCase

@@ -3,5 +3,5 @@ cd ${0%/*} || exit 1    # Run from this directory
 
 ls | grep -P "^(([0-9]+\.?[0-9]*)|(\.[0-9]+))$" | xargs -d"\n" rm -rf
 rm -rf VTK 
-
+rm -rf stl
 #------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_1m/runThisCase

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -e  # Exit immediately if a command exits with a non-zero status
+cd ${0%/*} || exit 1    # Run from this directory
+
+echo "\n<--------------------------------------------------------------------->"
+echo "0) Copying stl files"
+echo "\n<--------------------------------------------------------------------->"
+mkdir -p stl
+cp -rfv $pFlow_PROJECT_DIR/resources/stls/helicalMixer/* ./stl/
+
+echo "\n<--------------------------------------------------------------------->"
+echo "1) Creating particles"
+echo "<--------------------------------------------------------------------->\n"
+particlesPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "2) Creating geometry"
+echo "<--------------------------------------------------------------------->\n"
+geometryPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "3) Running the case"
+echo "<--------------------------------------------------------------------->\n"
+sphereGranFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "4) Converting to VtK"
+echo "<--------------------------------------------------------------------->\n"
+pFlowToVTK -f diameter id velocity --binary
+
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_1m/settings/domainDict

@@ -0,0 +1,49 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  domainDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// Simulation domain
+globalBox                                        
+{
+    min (-0.19  -0.19 -0.02);
+    max ( 0.19   0.26  0.92);
+}
+
+boundaries
+{
+    
+    left
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    right
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    bottom
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    top
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    rear
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    front
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+}

benchmarks/helicalMixer/helicalMixer_1m/settings/geometryDict

@@ -0,0 +1,60 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */
+objectName  geometryDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// motion model: rotating object around an axis
+motionModel rotatingAxis; 
+
+rotatingAxisInfo
+{
+    rotAxis 
+    {
+        // end points of axis
+        p1          (0 0 0);
+        p2          (0 0 1);
+        
+        // rotation speed (rad/s) => 30 rpm
+        omega       3.1428;      
+
+        // interval for rotation of axis 
+        startTime   2.5;
+        endTime     100;
+    }
+}
+
+surfaces
+{
+    
+    helix
+    {
+        type     stlWall;       // type of the wall
+        file     helix2.stl;    // file name in stl folder
+        material wallMat;       // material name of this wall
+        motion   rotAxis;       // motion component name 
+    }
+
+    shell
+    {
+        type     stlWall;       // type of the wall
+        file     shell2.stl;    // file name in stl folder      
+        material wallMat;       // material name of this wall
+        motion   none;          // motion component name 
+    }
+        
+    plug
+    {
+        type    planeWall;
+        p1      (-0.075 -0.185 0.375);
+        p2      ( 0.075 -0.185 0.375);
+        p3      ( 0.075 -0.185 0.525);
+        p4      (-0.075 -0.185 0.525);
+        material wallMat;
+        motion   none; 
+    }
+     
+}

benchmarks/helicalMixer/helicalMixer_1m/settings/particlesDict

@@ -0,0 +1,27 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particlesDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+setFields
+{
+    defaultValue 
+    {
+        velocity        realx3  (0 0 0);        // linear velocity (m/s)
+        acceleration    realx3  (0 0 0);        // linear acceleration (m/s2)
+        rVelocity       realx3  (0 0 0);        // rotational velocity (rad/s)
+        shapeName       word    smallParticle;  // name of the particle shape 
+    }
+
+    selectors
+    {}
+}
+
+positionParticles
+{
+    method empty;     // creates the required fields with zero particles (empty). 
+}

benchmarks/helicalMixer/helicalMixer_1m/settings/settingsDict

@@ -0,0 +1,37 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  settingsDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run         		helicalMixer;
+
+dt                  0.00001;      // time step for integration (s)
+
+startTime           0;            // start time for simulation
+
+endTime             7.5;          // end time for simulation
+
+saveInterval        0.05;         // time interval for saving the simulation
+
+timePrecision       4;            // maximum number of digits for time folder
+
+g                 	(0 -9.8 0);   // gravity vector (m/s2)
+
+// save necessary (i.e., required) data on disk
+includeObjects 		(diameter);                       
+
+// exclude unnecessary data from saving on disk
+excludeObjects 		(); 
+
+integrationMethod   	AdamsBashforth2; // integration method
+
+integrationHistory      off;             // Do not save integration history on the disk 
+
+writeFormat             binary;          // data writting format (ascii or binary)
+
+timersReport            Yes;             // report timers (Yes or No)
+
+timersReportInterval    0.05;            // time interval for reporting timers

benchmarks/helicalMixer/helicalMixer_250K/caseSetup/interaction

@@ -0,0 +1,53 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName interaction;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+materials   (glassMat wallMat); // a list of materials names
+
+densities   (2500.0 2500);      // density of materials [kg/m3]
+
+contactListType   sortedContactList;
+
+model
+{
+   contactForceModel    nonLinearLimited;
+   
+   rollingFrictionModel normal;
+
+   Yeff (1.0e6 1.0e6  // Young modulus [Pa]
+               1.0e6);
+   
+   Geff (0.8e6 0.8e6  // Shear modulus [Pa]
+               0.8e6);
+
+   nu    (0.25 0.25  // Poisson's ratio [-]
+               0.25);
+
+   en (0.97  0.85   // coefficient of normal restitution
+             1.00);
+
+   mu (0.65  0.65   // dynamic friction 
+             0.65);
+
+   mur (0.1  0.1    // rolling friction 
+             0.1);
+        
+}
+
+contactSearch
+{
+    method         NBS;  
+
+    updateInterval   10;
+
+    sizeRatio       1.1;
+
+    cellExtent     0.55;
+
+    adjustableBox   Yes;     
+}

benchmarks/helicalMixer/helicalMixer_250K/caseSetup/particleInsertion

@@ -0,0 +1,72 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particleInsertion;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+active  yes;          // is insertion active?
+
+particleInlet1
+{
+   regionType     box; // type of insertion region
+   
+   rate           62500;  // insertion rate (particles/s)
+   
+   timeControl    simulationTime;
+   
+   startTime      0;      // (s)
+   
+   endTime        2.0;    // (s)
+   
+   insertionInterval    0.05;  //s  
+
+   boxInfo 
+   {
+        min (-0.17 0.23 0.46); // (m,m,m)
+        max ( 0.17 0.24 0.88); // (m,m,m)
+   }
+   
+   setFields
+   {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+        smallParticle 1; // mixture composition of inserted particles 
+   }
+}
+
+particleInlet2
+{
+    regionType     box; // type of insertion region
+
+    rate           62500;  // insertion rate (particles/s)
+
+    timeControl    simulationTime;
+
+    startTime      0;      // (s)
+
+    endTime        2.0;    // (s)
+
+    insertionInterval    0.05;  //s  
+
+    boxInfo 
+    {
+        min ( -0.17 0.23 0.02); // (m,m,m)
+        max (  0.17 0.24 0.44); // (m,m,m)
+    }
+
+    setFields
+    {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+    }
+   
+   mixture
+   {
+        largeParticle 1; // mixture composition of inserted particles 
+   }
+}

benchmarks/helicalMixer/helicalMixer_250K/caseSetup/shapes

@@ -0,0 +1,12 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  shapes;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+names       (smallParticle largeParticle);  // names of shapes 
+diameters   (0.006 0.00601);                // diameter of shapes 
+materials   (glassMat glassMat);            // material names for shapes 

benchmarks/helicalMixer/helicalMixer_250K/cleanThisCase

@@ -0,0 +1,8 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+ls | grep -P "^(([0-9]+\.?[0-9]*)|(\.[0-9]+))$" | xargs -d"\n" rm -rf
+rm -rf VTK
+rm -rf stl 
+
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_250K/runThisCase

@@ -1,5 +1,12 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
+
+echo "\n<--------------------------------------------------------------------->"
+echo "0) Copying stl files"
+echo "\n<--------------------------------------------------------------------->"
+mkdir -p stl
+cp -rfv $pFlow_PROJECT_DIR/resources/stls/helicalMixer/* ./stl/
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"
 echo "<--------------------------------------------------------------------->\n"
@@ -18,6 +25,6 @@ sphereGranFlow
 echo "\n<--------------------------------------------------------------------->"
 echo "4) Converting to VtK"
 echo "<--------------------------------------------------------------------->\n"
-pFlowToVTK -f diameter id velocity
+pFlowToVTK -f diameter id velocity --binary
 
 #------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_250K/settings/domainDict

@@ -0,0 +1,49 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  domainDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// Simulation domain
+globalBox                                        
+{
+    min (-0.19  -0.19 -0.02);
+    max ( 0.19   0.26  0.92);
+}
+
+boundaries
+{
+    
+    left
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    right
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    bottom
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    top
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    rear
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    front
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+}

benchmarks/helicalMixer/helicalMixer_250K/settings/geometryDict

@@ -0,0 +1,60 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */
+objectName  geometryDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// motion model: rotating object around an axis
+motionModel rotatingAxis; 
+
+rotatingAxisInfo
+{
+    rotAxis 
+    {
+        // end points of axis
+        p1          (0 0 0);
+        p2          (0 0 1);
+        
+        // rotation speed (rad/s) => 30 rpm
+        omega       3.1428;      
+
+        // interval for rotation of axis 
+        startTime   2.5;
+        endTime     100;
+    }
+}
+
+surfaces
+{
+    
+    helix
+    {
+        type     stlWall;       // type of the wall
+        file     helix2.stl;    // file name in stl folder
+        material wallMat;       // material name of this wall
+        motion   rotAxis;       // motion component name 
+    }
+
+    shell
+    {
+        type     stlWall;       // type of the wall
+        file     shell2.stl;    // file name in stl folder      
+        material wallMat;       // material name of this wall
+        motion   none;          // motion component name 
+    }
+        
+    plug
+    {
+        type    planeWall;
+        p1      (-0.075 -0.185 0.375);
+        p2      ( 0.075 -0.185 0.375);
+        p3      ( 0.075 -0.185 0.525);
+        p4      (-0.075 -0.185 0.525);
+        material wallMat;
+        motion   none; 
+    }
+     
+}

benchmarks/helicalMixer/helicalMixer_250K/settings/particlesDict

@@ -0,0 +1,27 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particlesDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+setFields
+{
+    defaultValue 
+    {
+        velocity        realx3  (0 0 0);        // linear velocity (m/s)
+        acceleration    realx3  (0 0 0);        // linear acceleration (m/s2)
+        rVelocity       realx3  (0 0 0);        // rotational velocity (rad/s)
+        shapeName       word    smallParticle;  // name of the particle shape 
+    }
+
+    selectors
+    {}
+}
+
+positionParticles
+{
+    method empty;     // creates the required fields with zero particles (empty). 
+}

benchmarks/helicalMixer/helicalMixer_250K/settings/settingsDict

@@ -0,0 +1,37 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  settingsDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run         		helicalMixer;
+
+dt                  0.00001;      // time step for integration (s)
+
+startTime           0;            // start time for simulation
+
+endTime             7.5;          // end time for simulation
+
+saveInterval        0.05;         // time interval for saving the simulation
+
+timePrecision       4;            // maximum number of digits for time folder
+
+g                 	(0 -9.8 0);   // gravity vector (m/s2)
+
+// save necessary (i.e., required) data on disk
+includeObjects 		(diameter);                       
+
+// exclude unnecessary data from saving on disk
+excludeObjects 		(); 
+
+integrationMethod   	AdamsBashforth2; // integration method
+
+integrationHistory      off;             // Do not save integration history on the disk 
+
+writeFormat             binary;          // data writting format (ascii or binary)
+
+timersReport            Yes;             // report timers (Yes or No)
+
+timersReportInterval    0.05;            // time interval for reporting timers

benchmarks/helicalMixer/helicalMixer_2m/caseSetup/interaction

@@ -0,0 +1,53 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName interaction;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+materials   (glassMat wallMat); // a list of materials names
+
+densities   (2500.0 2500);      // density of materials [kg/m3]
+
+contactListType   sortedContactList;
+
+model
+{
+   contactForceModel    nonLinearLimited;
+   
+   rollingFrictionModel normal;
+
+   Yeff (1.0e6 1.0e6  // Young modulus [Pa]
+               1.0e6);
+   
+   Geff (0.8e6 0.8e6  // Shear modulus [Pa]
+               0.8e6);
+
+   nu    (0.25 0.25  // Poisson's ratio [-]
+               0.25);
+
+   en (0.97  0.85   // coefficient of normal restitution
+             1.00);
+
+   mu (0.65  0.65   // dynamic friction 
+             0.65);
+
+   mur (0.1  0.1    // rolling friction 
+             0.1);
+        
+}
+
+contactSearch
+{
+    method         NBS;  
+
+    updateInterval   10;
+
+    sizeRatio       1.1;
+
+    cellExtent     0.55;
+
+    adjustableBox   Yes;     
+}

benchmarks/helicalMixer/helicalMixer_2m/caseSetup/particleInsertion

@@ -0,0 +1,72 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particleInsertion;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+active  yes;          // is insertion active?
+
+particleInlet1
+{
+   regionType     box; // type of insertion region
+   
+   rate           500000;  // insertion rate (particles/s)
+   
+   timeControl    simulationTime;
+   
+   startTime      0;      // (s)
+   
+   endTime        2.0;    // (s)
+   
+   insertionInterval    0.05;  //s  
+
+   boxInfo 
+   {
+        min (-0.17 0.23 0.46); // (m,m,m)
+        max ( 0.17 0.24 0.88); // (m,m,m)
+   }
+   
+   setFields
+   {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+        smallParticle 1; // mixture composition of inserted particles 
+   }
+}
+
+particleInlet2
+{
+    regionType     box; // type of insertion region
+
+    rate           500000;  // insertion rate (particles/s)
+
+    timeControl    simulationTime;
+
+    startTime      0;      // (s)
+
+    endTime        2.0;    // (s)
+
+    insertionInterval    0.05;  //s  
+
+    boxInfo 
+    {
+        min ( -0.17 0.23 0.02); // (m,m,m)
+        max (  0.17 0.24 0.44); // (m,m,m)
+    }
+
+    setFields
+    {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+    }
+   
+   mixture
+   {
+        largeParticle 1; // mixture composition of inserted particles 
+   }
+}

benchmarks/helicalMixer/helicalMixer_2m/caseSetup/shapes

@@ -0,0 +1,12 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  shapes;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+names       (smallParticle largeParticle);  // names of shapes 
+diameters   (0.003 0.00301);                // diameter of shapes 
+materials   (glassMat glassMat);            // material names for shapes 

benchmarks/helicalMixer/helicalMixer_2m/cleanThisCase

@@ -0,0 +1,7 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+ls | grep -P "^(([0-9]+\.?[0-9]*)|(\.[0-9]+))$" | xargs -d"\n" rm -rf
+rm -rf VTK 
+rm -rf stl
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_2m/runThisCase

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -e  # Exit immediately if a command exits with a non-zero status
+cd ${0%/*} || exit 1    # Run from this directory
+
+echo "\n<--------------------------------------------------------------------->"
+echo "0) Copying stl files"
+echo "\n<--------------------------------------------------------------------->"
+mkdir -p stl
+cp -rfv $pFlow_PROJECT_DIR/resources/stls/helicalMixer/* ./stl/
+
+echo "\n<--------------------------------------------------------------------->"
+echo "1) Creating particles"
+echo "<--------------------------------------------------------------------->\n"
+particlesPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "2) Creating geometry"
+echo "<--------------------------------------------------------------------->\n"
+geometryPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "3) Running the case"
+echo "<--------------------------------------------------------------------->\n"
+sphereGranFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "4) Converting to VtK"
+echo "<--------------------------------------------------------------------->\n"
+pFlowToVTK -f diameter id velocity --binary
+
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_2m/settings/domainDict

@@ -0,0 +1,49 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  domainDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// Simulation domain
+globalBox                                        
+{
+    min (-0.19  -0.19 -0.02);
+    max ( 0.19   0.26  0.92);
+}
+
+boundaries
+{
+    
+    left
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    right
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    bottom
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    top
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    rear
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    front
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+}

benchmarks/helicalMixer/helicalMixer_2m/settings/geometryDict

@@ -0,0 +1,60 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */
+objectName  geometryDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// motion model: rotating object around an axis
+motionModel rotatingAxis; 
+
+rotatingAxisInfo
+{
+    rotAxis 
+    {
+        // end points of axis
+        p1          (0 0 0);
+        p2          (0 0 1);
+        
+        // rotation speed (rad/s) => 30 rpm
+        omega       3.1428;      
+
+        // interval for rotation of axis 
+        startTime   2.5;
+        endTime     100;
+    }
+}
+
+surfaces
+{
+    
+    helix
+    {
+        type     stlWall;       // type of the wall
+        file     helix2.stl;    // file name in stl folder
+        material wallMat;       // material name of this wall
+        motion   rotAxis;       // motion component name 
+    }
+
+    shell
+    {
+        type     stlWall;       // type of the wall
+        file     shell2.stl;    // file name in stl folder      
+        material wallMat;       // material name of this wall
+        motion   none;          // motion component name 
+    }
+        
+    plug
+    {
+        type    planeWall;
+        p1      (-0.075 -0.185 0.375);
+        p2      ( 0.075 -0.185 0.375);
+        p3      ( 0.075 -0.185 0.525);
+        p4      (-0.075 -0.185 0.525);
+        material wallMat;
+        motion   none; 
+    }
+     
+}

benchmarks/helicalMixer/helicalMixer_2m/settings/particlesDict

@@ -0,0 +1,27 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particlesDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+setFields
+{
+    defaultValue 
+    {
+        velocity        realx3  (0 0 0);        // linear velocity (m/s)
+        acceleration    realx3  (0 0 0);        // linear acceleration (m/s2)
+        rVelocity       realx3  (0 0 0);        // rotational velocity (rad/s)
+        shapeName       word    smallParticle;  // name of the particle shape 
+    }
+
+    selectors
+    {}
+}
+
+positionParticles
+{
+    method empty;     // creates the required fields with zero particles (empty). 
+}

benchmarks/helicalMixer/helicalMixer_2m/settings/settingsDict

@@ -0,0 +1,37 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  settingsDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run         		helicalMixer;
+
+dt                  0.00001;      // time step for integration (s)
+
+startTime           0;            // start time for simulation
+
+endTime             7.5;          // end time for simulation
+
+saveInterval        0.05;         // time interval for saving the simulation
+
+timePrecision       4;            // maximum number of digits for time folder
+
+g                 	(0 -9.8 0);   // gravity vector (m/s2)
+
+// save necessary (i.e., required) data on disk
+includeObjects 		(diameter);                       
+
+// exclude unnecessary data from saving on disk
+excludeObjects 		(); 
+
+integrationMethod   	AdamsBashforth2; // integration method
+
+integrationHistory      off;             // Do not save integration history on the disk 
+
+writeFormat             binary;          // data writting format (ascii or binary)
+
+timersReport            Yes;             // report timers (Yes or No)
+
+timersReportInterval    0.05;            // time interval for reporting timers

benchmarks/helicalMixer/helicalMixer_4m/caseSetup/interaction

@@ -0,0 +1,53 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName interaction;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+materials   (glassMat wallMat); // a list of materials names
+
+densities   (2500.0 2500);      // density of materials [kg/m3]
+
+contactListType   sortedContactList;
+
+model
+{
+   contactForceModel    nonLinearLimited;
+   
+   rollingFrictionModel normal;
+
+   Yeff (1.0e6 1.0e6  // Young modulus [Pa]
+               1.0e6);
+   
+   Geff (0.8e6 0.8e6  // Shear modulus [Pa]
+               0.8e6);
+
+   nu    (0.25 0.25  // Poisson's ratio [-]
+               0.25);
+
+   en (0.97  0.85   // coefficient of normal restitution
+             1.00);
+
+   mu (0.65  0.65   // dynamic friction 
+             0.65);
+
+   mur (0.1  0.1    // rolling friction 
+             0.1);
+        
+}
+
+contactSearch
+{
+    method         NBS;  
+
+    updateInterval   10;
+
+    sizeRatio       1.1;
+
+    cellExtent     0.55;
+
+    adjustableBox   Yes;     
+}

benchmarks/helicalMixer/helicalMixer_4m/caseSetup/particleInsertion

@@ -0,0 +1,72 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particleInsertion;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+active  yes;          // is insertion active?
+
+particleInlet1
+{
+   regionType     box; // type of insertion region
+   
+   rate           1000000;  // insertion rate (particles/s)
+   
+   timeControl    simulationTime;
+   
+   startTime      0;      // (s)
+   
+   endTime        2.0;    // (s)
+   
+   insertionInterval    0.05;  //s  
+
+   boxInfo 
+   {
+        min (-0.17 0.23 0.46); // (m,m,m)
+        max ( 0.17 0.24 0.88); // (m,m,m)
+   }
+   
+   setFields
+   {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+        smallParticle 1; // mixture composition of inserted particles 
+   }
+}
+
+particleInlet2
+{
+    regionType     box; // type of insertion region
+
+    rate           1000000;  // insertion rate (particles/s)
+
+    timeControl    simulationTime;
+
+    startTime      0;      // (s)
+
+    endTime        2.0;    // (s)
+
+    insertionInterval    0.05;  //s  
+
+    boxInfo 
+    {
+        min ( -0.17 0.23 0.02); // (m,m,m)
+        max (  0.17 0.24 0.44); // (m,m,m)
+    }
+
+    setFields
+    {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+    }
+   
+   mixture
+   {
+        largeParticle 1; // mixture composition of inserted particles 
+   }
+}

benchmarks/helicalMixer/helicalMixer_4m/caseSetup/shapes

@@ -0,0 +1,12 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  shapes;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+names       (smallParticle largeParticle);  // names of shapes 
+diameters   (0.002 0.00201);                // diameter of shapes 
+materials   (glassMat glassMat);            // material names for shapes 

benchmarks/helicalMixer/helicalMixer_4m/cleanThisCase

@@ -0,0 +1,7 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+ls | grep -P "^(([0-9]+\.?[0-9]*)|(\.[0-9]+))$" | xargs -d"\n" rm -rf
+rm -rf VTK 
+rm -rf stl
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_4m/runThisCase

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -e  # Exit immediately if a command exits with a non-zero status
+cd ${0%/*} || exit 1    # Run from this directory
+
+echo "\n<--------------------------------------------------------------------->"
+echo "0) Copying stl files"
+echo "\n<--------------------------------------------------------------------->"
+mkdir -p stl
+cp -rfv $pFlow_PROJECT_DIR/resources/stls/helicalMixer/* ./stl/
+
+echo "\n<--------------------------------------------------------------------->"
+echo "1) Creating particles"
+echo "<--------------------------------------------------------------------->\n"
+particlesPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "2) Creating geometry"
+echo "<--------------------------------------------------------------------->\n"
+geometryPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "3) Running the case"
+echo "<--------------------------------------------------------------------->\n"
+sphereGranFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "4) Converting to VtK"
+echo "<--------------------------------------------------------------------->\n"
+pFlowToVTK -f diameter id velocity --binary
+
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_4m/settings/domainDict

@@ -0,0 +1,49 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  domainDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// Simulation domain
+globalBox                                        
+{
+    min (-0.19  -0.19 -0.02);
+    max ( 0.19   0.26  0.92);
+}
+
+boundaries
+{
+    
+    left
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    right
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    bottom
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    top
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    rear
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    front
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+}

benchmarks/helicalMixer/helicalMixer_4m/settings/geometryDict

@@ -0,0 +1,60 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */
+objectName  geometryDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// motion model: rotating object around an axis
+motionModel rotatingAxis; 
+
+rotatingAxisInfo
+{
+    rotAxis 
+    {
+        // end points of axis
+        p1          (0 0 0);
+        p2          (0 0 1);
+        
+        // rotation speed (rad/s) => 30 rpm
+        omega       3.1428;      
+
+        // interval for rotation of axis 
+        startTime   2.5;
+        endTime     100;
+    }
+}
+
+surfaces
+{
+    
+    helix
+    {
+        type     stlWall;       // type of the wall
+        file     helix2.stl;    // file name in stl folder
+        material wallMat;       // material name of this wall
+        motion   rotAxis;       // motion component name 
+    }
+
+    shell
+    {
+        type     stlWall;       // type of the wall
+        file     shell2.stl;    // file name in stl folder      
+        material wallMat;       // material name of this wall
+        motion   none;          // motion component name 
+    }
+        
+    plug
+    {
+        type    planeWall;
+        p1      (-0.075 -0.185 0.375);
+        p2      ( 0.075 -0.185 0.375);
+        p3      ( 0.075 -0.185 0.525);
+        p4      (-0.075 -0.185 0.525);
+        material wallMat;
+        motion   none; 
+    }
+     
+}

benchmarks/helicalMixer/helicalMixer_4m/settings/particlesDict

@@ -0,0 +1,27 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particlesDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+setFields
+{
+    defaultValue 
+    {
+        velocity        realx3  (0 0 0);        // linear velocity (m/s)
+        acceleration    realx3  (0 0 0);        // linear acceleration (m/s2)
+        rVelocity       realx3  (0 0 0);        // rotational velocity (rad/s)
+        shapeName       word    smallParticle;  // name of the particle shape 
+    }
+
+    selectors
+    {}
+}
+
+positionParticles
+{
+    method empty;     // creates the required fields with zero particles (empty). 
+}

benchmarks/helicalMixer/helicalMixer_4m/settings/settingsDict

@@ -0,0 +1,37 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  settingsDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run         		helicalMixer;
+
+dt                  0.00001;      // time step for integration (s)
+
+startTime           0;            // start time for simulation
+
+endTime             7.5;          // end time for simulation
+
+saveInterval        0.05;         // time interval for saving the simulation
+
+timePrecision       4;            // maximum number of digits for time folder
+
+g                 	(0 -9.8 0);   // gravity vector (m/s2)
+
+// save necessary (i.e., required) data on disk
+includeObjects 		(diameter);                       
+
+// exclude unnecessary data from saving on disk
+excludeObjects 		(); 
+
+integrationMethod   	AdamsBashforth2; // integration method
+
+integrationHistory      off;             // Do not save integration history on the disk 
+
+writeFormat             binary;          // data writting format (ascii or binary)
+
+timersReport            Yes;             // report timers (Yes or No)
+
+timersReportInterval    0.05;            // time interval for reporting timers

benchmarks/helicalMixer/helicalMixer_500k/caseSetup/interaction

@@ -0,0 +1,53 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName interaction;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+materials   (glassMat wallMat); // a list of materials names
+
+densities   (2500.0 2500);      // density of materials [kg/m3]
+
+contactListType   sortedContactList;
+
+model
+{
+   contactForceModel    nonLinearLimited;
+   
+   rollingFrictionModel normal;
+
+   Yeff (1.0e6 1.0e6  // Young modulus [Pa]
+               1.0e6);
+   
+   Geff (0.8e6 0.8e6  // Shear modulus [Pa]
+               0.8e6);
+
+   nu    (0.25 0.25  // Poisson's ratio [-]
+               0.25);
+
+   en (0.97  0.85   // coefficient of normal restitution
+             1.00);
+
+   mu (0.65  0.65   // dynamic friction 
+             0.65);
+
+   mur (0.1  0.1    // rolling friction 
+             0.1);
+        
+}
+
+contactSearch
+{
+    method         NBS;  
+
+    updateInterval   10;
+
+    sizeRatio       1.1;
+
+    cellExtent     0.55;
+
+    adjustableBox   Yes;     
+}

benchmarks/helicalMixer/helicalMixer_500k/caseSetup/particleInsertion

@@ -0,0 +1,72 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particleInsertion;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+active  yes;          // is insertion active?
+
+particleInlet1
+{
+   regionType     box; // type of insertion region
+   
+   rate           125000;  // insertion rate (particles/s)
+   
+   timeControl    simulationTime;
+   
+   startTime      0;      // (s)
+   
+   endTime        2.0;    // (s)
+   
+   insertionInterval    0.05;  //s  
+
+   boxInfo 
+   {
+        min (-0.17 0.23 0.46); // (m,m,m)
+        max ( 0.17 0.24 0.88); // (m,m,m)
+   }
+   
+   setFields
+   {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+        smallParticle 1; // mixture composition of inserted particles 
+   }
+}
+
+particleInlet2
+{
+    regionType     box; // type of insertion region
+
+    rate           125000;  // insertion rate (particles/s)
+
+    timeControl    simulationTime;
+
+    startTime      0;      // (s)
+
+    endTime        2.0;    // (s)
+
+    insertionInterval    0.05;  //s  
+
+    boxInfo 
+    {
+        min ( -0.17 0.23 0.02); // (m,m,m)
+        max (  0.17 0.24 0.44); // (m,m,m)
+    }
+
+    setFields
+    {
+        velocity    realx3 (0.0 -0.3 0.0); // initial velocity of inserted particles 
+    }
+   
+   mixture
+   {
+        largeParticle 1; // mixture composition of inserted particles 
+   }
+}

benchmarks/helicalMixer/helicalMixer_500k/caseSetup/shapes

@@ -0,0 +1,12 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  shapes;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+names       (smallParticle largeParticle);  // names of shapes 
+diameters   (0.005 0.00501);                // diameter of shapes 
+materials   (glassMat glassMat);            // material names for shapes 

benchmarks/helicalMixer/helicalMixer_500k/cleanThisCase

@@ -0,0 +1,7 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+ls | grep -P "^(([0-9]+\.?[0-9]*)|(\.[0-9]+))$" | xargs -d"\n" rm -rf
+rm -rf VTK 
+rm -rf stl
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_500k/runThisCase

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -e  # Exit immediately if a command exits with a non-zero status
+cd ${0%/*} || exit 1    # Run from this directory
+
+echo "\n<--------------------------------------------------------------------->"
+echo "0) Copying stl files"
+echo "\n<--------------------------------------------------------------------->"
+mkdir -p stl
+cp -rfv $pFlow_PROJECT_DIR/resources/stls/helicalMixer/* ./stl/
+
+echo "\n<--------------------------------------------------------------------->"
+echo "1) Creating particles"
+echo "<--------------------------------------------------------------------->\n"
+particlesPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "2) Creating geometry"
+echo "<--------------------------------------------------------------------->\n"
+geometryPhasicFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "3) Running the case"
+echo "<--------------------------------------------------------------------->\n"
+sphereGranFlow
+
+echo "\n<--------------------------------------------------------------------->"
+echo "4) Converting to VtK"
+echo "<--------------------------------------------------------------------->\n"
+pFlowToVTK -f diameter id velocity --binary
+
+#------------------------------------------------------------------------------

benchmarks/helicalMixer/helicalMixer_500k/settings/domainDict

@@ -0,0 +1,49 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  domainDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// Simulation domain
+globalBox                                        
+{
+    min (-0.19  -0.19 -0.02);
+    max ( 0.19   0.26  0.92);
+}
+
+boundaries
+{
+    
+    left
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    right
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    bottom
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    top
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    rear
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+
+    front
+    {
+        type     exit;        // other options: periodic, reflective 
+    }
+}

benchmarks/helicalMixer/helicalMixer_500k/settings/geometryDict

@@ -0,0 +1,60 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */
+objectName  geometryDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+// motion model: rotating object around an axis
+motionModel rotatingAxis; 
+
+rotatingAxisInfo
+{
+    rotAxis 
+    {
+        // end points of axis
+        p1          (0 0 0);
+        p2          (0 0 1);
+        
+        // rotation speed (rad/s) => 30 rpm
+        omega       3.1428;      
+
+        // interval for rotation of axis 
+        startTime   2.5;
+        endTime     100;
+    }
+}
+
+surfaces
+{
+    
+    helix
+    {
+        type     stlWall;       // type of the wall
+        file     helix2.stl;    // file name in stl folder
+        material wallMat;       // material name of this wall
+        motion   rotAxis;       // motion component name 
+    }
+
+    shell
+    {
+        type     stlWall;       // type of the wall
+        file     shell2.stl;    // file name in stl folder      
+        material wallMat;       // material name of this wall
+        motion   none;          // motion component name 
+    }
+        
+    plug
+    {
+        type    planeWall;
+        p1      (-0.075 -0.185 0.375);
+        p2      ( 0.075 -0.185 0.375);
+        p3      ( 0.075 -0.185 0.525);
+        p4      (-0.075 -0.185 0.525);
+        material wallMat;
+        motion   none; 
+    }
+     
+}

benchmarks/helicalMixer/helicalMixer_500k/settings/particlesDict

@@ -0,0 +1,27 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName  particlesDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+
+setFields
+{
+    defaultValue 
+    {
+        velocity        realx3  (0 0 0);        // linear velocity (m/s)
+        acceleration    realx3  (0 0 0);        // linear acceleration (m/s2)
+        rVelocity       realx3  (0 0 0);        // rotational velocity (rad/s)
+        shapeName       word    smallParticle;  // name of the particle shape 
+    }
+
+    selectors
+    {}
+}
+
+positionParticles
+{
+    method empty;     // creates the required fields with zero particles (empty). 
+}

benchmarks/helicalMixer/helicalMixer_500k/settings/settingsDict

@@ -0,0 +1,37 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName  settingsDict;
+objectType  dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run         		helicalMixer;
+
+dt                  0.00001;      // time step for integration (s)
+
+startTime           0;            // start time for simulation
+
+endTime             7.5;          // end time for simulation
+
+saveInterval        0.05;         // time interval for saving the simulation
+
+timePrecision       4;            // maximum number of digits for time folder
+
+g                 	(0 -9.8 0);   // gravity vector (m/s2)
+
+// save necessary (i.e., required) data on disk
+includeObjects 		(diameter);                       
+
+// exclude unnecessary data from saving on disk
+excludeObjects 		(); 
+
+integrationMethod   	AdamsBashforth2; // integration method
+
+integrationHistory      off;             // Do not save integration history on the disk 
+
+writeFormat             binary;          // data writting format (ascii or binary)
+
+timersReport            Yes;             // report timers (Yes or No)
+
+timersReportInterval    0.05;            // time interval for reporting timers

benchmarks/helicalMixer/readme.md

@@ -1 +1,101 @@
 # Helical Mixer Benchmark (phasicFlow v-1.0)
+
+## Overview
+
+This benchmark compares the performance of phasicFlow with a well-stablished commercial DEM software for simulating a helical mixer with varying particle counts (250k to 4M particles). The benchmark measures both computational efficiency and memory usage across different hardware configurations.
+
+**Summary of Results:**
+
+- phasicFlow achieves similar performance to the commercial DEM software on the same hardware.
+- phasicFlow shows a 30% performance improvement when using the NVIDIA RTX A4000 compared to the RTX 4050Ti.
+- Memory usage is approximately 50% lower in phasicFlow compared to the commercial software, with phasicFlow using about 0.7 GB of memory per million particles, while the commercial software uses about 1.5 GB per million particles.
+
+## Simulation Setup
+
+<div align="center">
+    <img src="./images/commericalDEMsnapshot.png"/>
+    <div align="center">  
+        <p>Figure 1. Commercial DEM simulation snapshot</p>
+    </div>
+</div>
+
+<div align="center">
+    <img src="./images/phasicFlow_snapshot.png"/>
+    <div align="center">  
+        <p>Figure 2. phasicFlow simulation snapshot and visualized using Paraview</p>
+    </div>
+</div>
+
+### Hardware Specifications
+
+<div align="center">
+    Table 1. Hardware specifications used for benchmarking.
+</div>
+
+|  System     |           CPU            |             GPU              | Operating System |
+| :---------: | :----------------------: | :--------------------------: | :--------------: |
+|   Laptop    | Intel i9-13900HX 2.2 GHz | NVIDIA GeForce RTX 4050Ti 6G | Windows 11 24H2  |
+| Workstation | Intel Xeon 4210 2.2 GHz  |     NVIDIA RTX A4000 16G     |   Ubuntu 22.04   |
+
+### Simulation Parameters
+
+<div align="center">
+    Table 2. Parameters for helical mixer simulations.
+</div>
+
+| Case     | Particle Diameter | Particle Count | 
+| :-------: | :---------------: | :--------------: | 
+| 250k     | 6 mm              | 250,000        | 
+| 500k     | 5 mm              | 500,000        | 
+| 1M       | 4 mm              | 1,000,000      | 
+| 2M       | 3 mm              | 2,000,000      | 
+| 4M       | 2 mm              | 4,000,000      |
+
+The time step for all simulations was set to 1.0e-5 seconds and the simulation ran for 7.5 seconds.
+
+## Performance Comparison
+
+### Execution Time
+
+<div align="center">
+    Table 3. Total calculation time (minutes) for different configurations.
+</div>
+
+|     Software      | 250k   | 500k   | 1M     | 2M     | 4M     | 
+| :---------------: | :----: | :-----: | :-----: | :-----: | :-----: |
+| phasicFlow-4050Ti | 110 min | 215 min | 413 min | - | -       | 
+| Commercial DEM-4050Ti | 111 min | 210 min | 415 min | - | -       | 
+| phasicFlow-A4000  | 82 min | 150 min  | 300 min | 613 min | 1236 min |
+
+The execution time scales linearly with particle count. phasicFlow demonstrates approximately:
+
+- the computing speed is basically the same as well-established commercial DEM software on the same hardware
+- 30% performance improvement when using the NVIDIA RTX A4000 compared to the RTX 4050Ti
+
+<div align="center">
+    <img src="./images/performance.png"/>
+    <p>Figure 3. Calculation time comparison between phasicFlow and the well-established commercial DEM software.</p>
+</div>
+
+### Memory Usage
+
+<div align="center">
+    Table 4. Memory consumption for different configurations.
+</div>
+
+|     Software      | 250k   | 500k   | 1M      | 2M      | 4M      | 
+| :---------------: | :-----: | :-----: | :-----: | :-----: | :-----: | 
+| phasicFlow-4050Ti | 260 MB  | 404 MB  | 710 MB  | - | -       | 
+| Commercial DEM-4050Ti | 460 MB | 920 MB | 1574 MB | - | -       | 
+| phasicFlow-A4000  | 352 MB  | 496 MB  | 802 MB  | 1376 MB | 2310 MB |
+
+Memory efficiency comparison:
+
+- phasicFlow uses approximately 0.7 GB of memory per million particles
+- Commercial DEM software uses approximately 1.5 GB of memory per million particles
+- phasicFlow shows ~50% lower memory consumption compared to the commercial alternative
+- The memory usage scales linearly with particle count in both software packages. But due to memory limitations on GPUs, it is possible to run larger simulation on GPUs with phasicFlow.
+
+## Run Your Own Benchmarks
+
+The simulation case setup files are available in this folder for users interested in performing similar benchmarks on their own hardware. These files can be used to reproduce the tests and compare performance across different systems.

benchmarks/helicalMixer/settings/geometryDict

@@ -1,56 +0,0 @@
-/* -------------------------------*- C++ -*--------------------------------- *\ 
-|  phasicFlow File                                                            | 
-|  copyright: www.cemf.ir                                                     | 
-\* ------------------------------------------------------------------------- */  
-
-objectName 	geometryDict;
-objectType 	dictionary;
-
-// motion model: rotating object around an axis
-motionModel rotatingAxisMotion; 
-
-surfaces
-{
-	
-	helix
-	{
-		type 	 stlWall;   // type of the wall
-		file 	 helix2.stl;	// file name in stl folder
-		material wallMat;   // material name of this wall
-		motion 	 rotAxis;	// motion component name 
-	}
-
-	
-	shell
-	{
-		type 	 stlWall;  	// type of the wall
-		file 	 shell2.stl;	// file name in stl folder		
-		material wallMat;   // material name of this wall
-		motion 	 none;		// motion component name 
-	}
-
-		
-	plug
-	{
-		type 	planeWall;
-		p1 (-0.075 -0.185 0.375);
-		p2 ( 0.075 -0.185 0.375);
-		p3 ( 0.075 -0.185 0.525);
-		p4 (-0.075 -0.185 0.525);
-		material wallMat;   // material name of this wall
-		motion 	 none;		// motion component name 
-	}
-	
-	
-}
-
-// information for rotatingAxisMotion motion model 
-rotatingAxisMotionInfo
-{
-	rotAxis 
-	{
-		p1 ( 0 0 0);
-		p2 ( 0 0 1);
-		omega 0; //3.1428; 		// rotation speed (rad/s) => 30 rpm
-	}
-}

benchmarks/helicalMixer/settings/particlesDict

@@ -1,31 +0,0 @@
-/* -------------------------------*- C++ -*--------------------------------- *\ 
-|  phasicFlow File                                                            | 
-|  copyright: www.cemf.ir                                                     | 
-\* ------------------------------------------------------------------------- */  
-
-objectName 	particlesDict;
-objectType 	dictionary;
-
-setFields
-{
-	defaultValue 
-	{
-		velocity 		realx3 	(0 0 0); 		// linear velocity (m/s)
-		acceleration 	realx3 	(0 0 0); 		// linear acceleration (m/s2)
-		rotVelocity 	realx3 	(0 0 0);  		// rotational velocity (rad/s)
-		shapeName 		word	smallParticle; 	// name of the particle shape 
-	}
-
-	selectors
-	{}
-}
-
-// positions particles 
-positionParticles
-{
-	method empty;     		// creates the required fields with zero particles (empty). 
-
-	maxNumberOfParticles 	4100000; // maximum number of particles in the simulation
-	mortonSorting 			Yes;    // perform initial sorting based on morton code?   
-
-}

benchmarks/helicalMixer/settings/settingsDict

@@ -1,36 +0,0 @@
-/* -------------------------------*- C++ -*--------------------------------- *\ 
-|  phasicFlow File                                                            | 
-|  copyright: www.cemf.ir                                                     | 
-\* ------------------------------------------------------------------------- */  
-objectName 	settingsDict;
-objectType 	dictionary;;
-
-run 			inclinedScrewConveyor;
-
-dt 				0.00001; 	// time step for integration (s)
-
-startTime 		2.9; 			// start time for simulation 
-
-endTime 		7;			// end time for simulation 
-
-saveInterval 	0.05; 		// time interval for saving the simulation
-
-timePrecision   3;			// maximum number of digits for time folder 
-
-g 				(0 -9.8 0); // gravity vector (m/s2) 
-
-/*
-	Simulation domain 
-	every particles that goes outside this domain is deleted.
-*/
-domain 
-{
-	min (-0.19  -0.19 -0.02);
-	max ( 0.19   0.26  0.92);
-}
-
-integrationMethod 		AdamsBashforth2; 	// integration method 
-
-timersReport 			Yes;  	// report timers?
-
-timersReportInterval   	0.01;	// time interval for reporting timers

benchmarks/readme.md

@@ -1,7 +1,9 @@
 
 # Benchmarks
 
-Benchmakrs has been done on two different simulations: a simulation with simple geometry (rotating drum) and a simulation with complex geometry (helical mixer).
+Benchmakrs has been done on two different simulations: simulation with simple geometry (rotating drum) and a simulation with complex geometry (helical mixer). These benchmarks are used to show how PhasicFlow performs in different scenarios.
 
-- [rotating drum](./rotatingDrum/readme.md)
+- [rotating drum](./rotatingDrum/)
-- [helical mixer](./helicalMixer/readme.md)
+- [helical mixer](./helicalMixer/)
+
+**Note:** If you have performed benchmarks with PhasicFlow using other hardware or software other than PhasicFlow, we would be happy to include them in this section. Please open an issue for more arrangements or send a pull request with the benchmarks results.

benchmarks/rotatingDrum/readme.md

@@ -4,6 +4,12 @@
 
 This benchmark compares the performance of phasicFlow with a well-stablished commercial DEM software for simulating a rotating drum with varying particle counts (250k to 8M particles). The benchmark measures both computational efficiency and memory usage across different hardware configurations.
 
+**Summary of Results:**
+
+- phasicFlow achieves approximately 20% faster calculation than the commercial DEM software on the same hardware.
+- phasicFlow shows a 30% performance improvement when using the NVIDIA RTX A4000 compared to the RTX 4050Ti.
+- Memory usage is approximately 42% lower in phasicFlow compared to the commercial software, with phasicFlow using about 0.7 GB of memory per million particles, while the commercial software uses about 1.2 GB per million particles
+
 ## Simulation Setup
 
 <div align="center">

benchmarks/rotatingDrum/rotatingDrum_1mParticles/runThisCase

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"

benchmarks/rotatingDrum/rotatingDrum_250kParticles/runThisCase

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"

benchmarks/rotatingDrum/rotatingDrum_2mParticles/runThisCase

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"

benchmarks/rotatingDrum/rotatingDrum_4mParticles/runThisCase

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"

benchmarks/rotatingDrum/rotatingDrum_8mParticles/runThisCase

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e  # Exit immediately if a command exits with a non-zero status
 cd ${0%/*} || exit 1    # Run from this directory
 echo "\n<--------------------------------------------------------------------->"
 echo "1) Creating particles"

cmake/bashrc

@@ -19,7 +19,7 @@ export pFlow_SRC_DIR="$pFlow_PROJECT_DIR/src"
 
 export Kokkos_DIR="$kokkosDir"
 
-export Zoltan_DIR="$projectDir/Zoltan"
+#export Zoltan_DIR="$projectDir/Zoltan"
 
 # Cleanup variables (done as final statement for a clean exit code)
 unset projectDir

cmake/zoltanInstallCheck.cmake

@@ -0,0 +1,44 @@
+# Macro to check for Zoltan installation and build it if needed
+# Usage: zoltan_find_or_build(ZOLTAN_DIR)
+# Returns: ZOLTAN_INCLUDE_DIR, ZOLTAN_LIBRARY
+
+macro(zoltan_find_or_build ZOLTAN_DIR)
+    # Set the Zoltan directory
+    set(ZOLTAN_PREFIX "${ZOLTAN_DIR}" CACHE STRING "Zoltan install directory")
+    message(STATUS "Zoltan install directory is ${ZOLTAN_PREFIX}")
+
+    # Check if the Zoltan library is already built
+    find_path(ZOLTAN_INCLUDE_DIR zoltan.h PATHS "${ZOLTAN_PREFIX}/include")
+    message(STATUS "Zoltan include path: ${ZOLTAN_INCLUDE_DIR}")
+
+    find_library(ZOLTAN_LIBRARY zoltan PATHS "${ZOLTAN_PREFIX}/lib")
+    message(STATUS "Zoltan lib path: ${ZOLTAN_LIBRARY}")
+    
+    # Check if Zoltan library exists, if not compile it using buildlib script
+    if(NOT ZOLTAN_LIBRARY)
+        message(STATUS "Zoltan library not found. Compiling from source using buildlib script...")
+
+        # Execute the buildlib bash script
+        execute_process(
+            COMMAND bash ${ZOLTAN_PREFIX}/buildlib
+            WORKING_DIRECTORY ${ZOLTAN_PREFIX}
+            RESULT_VARIABLE ZOLTAN_BUILD_RESULT
+            OUTPUT_VARIABLE ZOLTAN_BUILD_OUTPUT
+            ERROR_VARIABLE ZOLTAN_BUILD_ERROR
+        )
+
+        if(NOT ZOLTAN_BUILD_RESULT EQUAL 0)
+            message(FATAL_ERROR "Failed to build Zoltan library using buildlib script. Error: ${ZOLTAN_BUILD_ERROR}")
+        endif()
+
+        # Try to find the library again after building
+        find_library(ZOLTAN_LIBRARY zoltan PATHS "${ZOLTAN_PREFIX}/lib" NO_DEFAULT_PATH)
+        find_path(ZOLTAN_INCLUDE_DIR zoltan.h PATHS "${ZOLTAN_PREFIX}/include" NO_DEFAULT_PATH)
+
+        if(NOT ZOLTAN_LIBRARY)
+            message(FATAL_ERROR "Failed to locate Zoltan library after building")
+        endif()
+
+        message(STATUS "Successfully built Zoltan library at ${ZOLTAN_LIBRARY}")
+    endif()
+endmacro()

src/Integration/AdamsBashforth2/processorAB2BoundaryIntegration.cpp

@@ -0,0 +1,71 @@
+#include "processorAB2BoundaryIntegration.hpp"
+#include "AdamsBashforth2.hpp"
+#include "AB2Kernels.hpp"
+#include "boundaryConfigs.hpp"
+
+pFlow::processorAB2BoundaryIntegration::processorAB2BoundaryIntegration(
+    const boundaryBase &boundary, 
+    const pointStructure &pStruct,  
+    const word &method,
+    integration& intgrtn
+)
+:
+    boundaryIntegration(boundary, pStruct, method, intgrtn)
+{}
+
+bool pFlow::processorAB2BoundaryIntegration::correct(
+    real dt, 
+	const realx3PointField_D& y, 
+	const realx3PointField_D& dy
+)
+{
+
+#ifndef BoundaryModel1
+    if(this->isBoundaryMaster())
+    {
+        const uint32 thisIndex = thisBoundaryIndex();
+		const auto&  AB2 =  static_cast<const AdamsBashforth2&>(Integration());
+        const auto& dy1View = AB2.BoundaryField(thisIndex).neighborProcField().deviceView();
+		const auto& dyView = dy.BoundaryField(thisIndex).neighborProcField().deviceView();
+		const auto& yView = y.BoundaryField(thisIndex).neighborProcField().deviceView();        
+        const rangeU32 aRange(0u, dy1View.size());
+        return  AB2Kernels::intAllActive(
+			"AB2Integration::correct."+this->boundaryName(), 
+			dt,
+            aRange, 
+			yView, 
+			dyView, 
+			dy1View
+		); 
+    }
+#endif //BoundaryModel1
+    
+    
+    return true;
+}
+
+bool pFlow::processorAB2BoundaryIntegration::correctPStruct(real dt, const realx3PointField_D &vel)
+{
+
+	#ifndef BoundaryModel1
+    if(this->isBoundaryMaster())
+    {
+		const uint32 thisIndex = thisBoundaryIndex();
+		const auto&  AB2 =  static_cast<const AdamsBashforth2&>(Integration());
+		const auto& dy1View = AB2.BoundaryField(thisIndex).neighborProcField().deviceView();
+		const auto& velView = vel.BoundaryField(thisIndex).neighborProcField().deviceView();
+		const auto& xposView = boundary().neighborProcPoints().deviceView();        
+		const rangeU32 aRange(0u, dy1View.size());
+		return  AB2Kernels::intAllActive(
+			"AB2Integration::correctPStruct."+this->boundaryName(), 
+			dt,
+			aRange, 
+			xposView, 
+			velView, 
+			dy1View
+		); 
+    }
+#endif //BoundaryModel1
+    
+    return true;
+}

src/Integration/AdamsBashforth2/processorAB2BoundaryIntegration.hpp

@@ -0,0 +1,51 @@
+
+
+#ifndef __processorAB2BoundaryIntegration_hpp__
+#define __processorAB2BoundaryIntegration_hpp__
+
+#include "boundaryIntegration.hpp"
+
+namespace pFlow
+{
+
+class processorAB2BoundaryIntegration
+:
+    public boundaryIntegration
+{   
+public:
+
+    TypeInfo("boundaryIntegration<processor,AdamsBashforth2>");
+
+    processorAB2BoundaryIntegration(
+        const boundaryBase& boundary,
+        const pointStructure& pStruct, 
+        const word& method,
+        integration& intgrtn
+    );
+
+    ~processorAB2BoundaryIntegration()override=default;
+
+    
+	bool correct(
+        real dt, 
+        const realx3PointField_D& y, 
+        const realx3PointField_D& dy)override;
+	
+
+    
+    bool correctPStruct(real dt, const realx3PointField_D& vel)override;
+    
+    
+    add_vCtor(
+        boundaryIntegration,
+        processorAB2BoundaryIntegration,
+        boundaryBase
+    );
+
+    
+
+};
+
+}
+
+#endif

src/Interaction/contactSearch/boundaries/processorBoundaryContactSearch/processorBoundaryContactSearch.cpp

@@ -0,0 +1,111 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+#include "processorBoundaryContactSearch.hpp"
+#include "contactSearch.hpp"
+#include "particles.hpp"
+//#include "pointStructure.hpp"
+//#include "geometry.hpp"
+
+
+void pFlow::processorBoundaryContactSearch::setSearchBox()
+{
+       
+    auto l = boundary().neighborLength();
+    auto n = boundary().boundaryPlane().normal();
+    auto pp1 = boundary().boundaryPlane().parallelPlane(l);
+    auto pp2 = boundary().boundaryPlane().parallelPlane(-l);
+
+    realx3 minP1 = min(min(min(pp1.p1(), pp1.p2()), pp1.p3()), pp1.p4());
+    realx3 maxP1 = max(max(max(pp1.p1(), pp1.p2()), pp1.p3()), pp1.p4());
+
+    realx3 minP2 = min(min(min(pp2.p1(), pp2.p2()), pp2.p3()), pp2.p4());
+    realx3 maxP2 = max(max(max(pp2.p1(), pp2.p2()), pp2.p3()), pp2.p4());
+
+    auto minP = min(minP1, minP2) - l*(realx3(1.0)-abs(n));
+    auto maxP = max(maxP1, maxP2) + l*(realx3(1.0)-abs(n));
+    
+    searchBox_={minP, maxP};
+}
+
+pFlow::processorBoundaryContactSearch::processorBoundaryContactSearch(
+    const dictionary &dict,
+    const boundaryBase &boundary,
+    const contactSearch &cSearch)
+: 
+    boundaryContactSearch(dict, boundary, cSearch),
+    diameter_(cSearch.Particles().boundingSphere()),
+    masterSearch_(this->isBoundaryMaster()),
+    sizeRatio_(dict.getVal<real>("sizeRatio"))
+{
+    
+    if(masterSearch_)
+    {        
+        setSearchBox();
+        
+        real minD;
+        real maxD;
+        cSearch.Particles().boundingSphereMinMax(minD, maxD);
+        
+        ppContactSearch_ = makeUnique<twoPartContactSearch>(
+            searchBox_,
+            maxD,
+            sizeRatio_);
+    }
+    else
+    {
+        searchBox_={{0,0,0},{0,0,0}};
+    }
+}
+
+bool pFlow::processorBoundaryContactSearch::broadSearch
+(
+    uint32 iter, 
+    real t, 
+    real dt, 
+    csPairContainerType &ppPairs, 
+    csPairContainerType &pwPairs, 
+    bool force
+)
+{
+    if(masterSearch_)
+    {
+        const auto thisPoints = boundary().thisPoints();
+        const auto& neighborProcPoints = boundary().neighborProcPoints();
+        const auto& bDiams = diameter_.BoundaryField(thisBoundaryIndex());
+        const auto thisDiams = bDiams.thisField();
+        const auto& neighborProcDiams = bDiams.neighborProcField();
+        
+        ppContactSearch_().broadSearchPP(
+            ppPairs, 
+            thisPoints, 
+            thisDiams,
+            neighborProcPoints,
+            neighborProcDiams,
+            boundaryName()
+        );
+        //pOutput<<"ppSize "<< ppPairs.size()<<endl;
+        return true;
+
+    }else
+    {
+        return true;
+    }
+}

src/Interaction/contactSearch/boundaries/processorBoundaryContactSearch/processorBoundaryContactSearch.hpp

@@ -0,0 +1,76 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+#ifndef __processorBoundaryContactSearch_hpp__
+#define __processorBoundaryContactSearch_hpp__
+
+#include "boundaryContactSearch.hpp"
+#include "pointFields.hpp"
+#include "twoPartContactSearch.hpp"
+
+namespace pFlow
+{
+
+class processorBoundaryContactSearch : public boundaryContactSearch
+{
+private:
+
+	box                             searchBox_;
+
+	uniquePtr<twoPartContactSearch> ppContactSearch_ = nullptr;
+
+	const realPointField_D&         diameter_;
+
+	bool                            masterSearch_;
+
+	real 							sizeRatio_;
+
+	void                            setSearchBox();
+
+public:
+
+	TypeInfo("boundaryContactSearch<MPI,processor>")
+
+	  processorBoundaryContactSearch(
+	    const dictionary&    dict,
+	    const boundaryBase&  boundary,
+	    const contactSearch& cSearch
+	  );
+
+	~processorBoundaryContactSearch() override = default;
+
+	add_vCtor(
+	  boundaryContactSearch,
+	  processorBoundaryContactSearch,
+	  boundaryBase
+	);
+
+	bool broadSearch(
+	  uint32               iter,
+	  real                 t,
+	  real                 dt,
+	  csPairContainerType& ppPairs,
+	  csPairContainerType& pwPairs,
+	  bool                 force = false
+	) override;
+};
+
+}
+
+#endif //__processorBoundaryContactSearch_hpp__

src/Interaction/contactSearch/boundaries/twoPartContactSearch/twoPartContactSearch.cpp

@@ -0,0 +1,163 @@
+
+#include "twoPartContactSearch.hpp"
+#include "twoPartContactSearchKernels.hpp"
+#include "phasicFlowKokkos.hpp"
+#include "streams.hpp"
+
+void pFlow::twoPartContactSearch::checkAllocateNext(uint32 n)
+{
+	if( nextCapacity_ < n)
+	{
+		nextCapacity_ = n;	
+		reallocNoInit(next_, n);
+	}
+}
+
+void pFlow::twoPartContactSearch::nullifyHead()
+{
+	fill(head_, static_cast<uint32>(-1));
+}
+
+void pFlow::twoPartContactSearch::nullifyNext(uint32 n)
+{
+	fill(next_, 0u, n, static_cast<uint32>(-1));
+}
+
+void pFlow::twoPartContactSearch::buildList(
+	const deviceScatteredFieldAccess<realx3> &points)
+{
+	if(points.empty())return;
+	uint32 n = points.size();
+	checkAllocateNext(n);
+	nullifyNext(n);
+	nullifyHead();
+	
+	pFlow::twoPartContactSearchKernels::buildNextHead(
+		points,
+		searchCells_,
+		head_,
+		next_
+	);
+}
+
+pFlow::twoPartContactSearch::twoPartContactSearch
+(
+    const box &domain,
+    real cellSize,
+	real sizeRatio
+)
+:
+	searchCells_(domain, cellSize),
+	head_("periodic:head",searchCells_.nx(), searchCells_.ny(), searchCells_.nz()),
+	sizeRatio_(sizeRatio)
+{
+
+}
+
+bool pFlow::twoPartContactSearch::broadSearchPP
+(
+	csPairContainerType &ppPairs, 
+	const deviceScatteredFieldAccess<realx3> &points1, 
+	const deviceScatteredFieldAccess<real>& diams1, 
+	const deviceScatteredFieldAccess<realx3> &points2, 
+	const deviceScatteredFieldAccess<real>& diams2, 
+	const realx3& transferVec
+)
+{
+	if(points1.empty())return true;
+	if(points2.empty()) return true;
+
+	buildList(points1);
+
+	uint32 nNotInserted = 1;
+
+	// loop until the container size fits the numebr of contact pairs
+	while (nNotInserted > 0)
+	{
+
+		nNotInserted = pFlow::twoPartContactSearchKernels::broadSearchPP
+		(
+			ppPairs,
+			points1,
+			diams1,
+			points2,
+			diams2,
+			transferVec,
+			head_,
+			next_,
+			searchCells_,
+			sizeRatio_
+		);
+		
+	
+		if(nNotInserted)
+		{
+			// - resize the container
+			//   note that getFull now shows the number of failed insertions.
+			uint32 len = max(nNotInserted,100u) ;
+			
+			auto oldCap = ppPairs.capacity();
+			
+			ppPairs.increaseCapacityBy(len);
+
+			INFORMATION<< "Particle-particle contact pair container capacity increased from "<<
+			oldCap << " to "<<ppPairs.capacity()<<" in contact search in boundary region."<<END_INFO;
+			
+		}
+
+	}	
+	
+    return true;
+}
+
+bool pFlow::twoPartContactSearch::broadSearchPP
+(
+	csPairContainerType &ppPairs,
+	const deviceScatteredFieldAccess<realx3> &points1,
+	const deviceScatteredFieldAccess<real> &diams1,
+	const realx3Vector_D& points2,
+	const realVector_D& diams2,
+	const word& name
+)
+{
+	buildList(points1);
+
+	uint32 nNotInserted = 1;
+
+	// loop until the container size fits the numebr of contact pairs
+	while (nNotInserted > 0)
+	{
+
+		nNotInserted = pFlow::twoPartContactSearchKernels::broadSearchPP
+		(
+			ppPairs,
+			points1,
+			diams1,
+			points2,
+			diams2,
+			head_,
+			next_,
+			searchCells_,
+			sizeRatio_
+		);
+		
+	
+		if(nNotInserted)
+		{
+			// - resize the container
+			//   note that getFull now shows the number of failed insertions.
+			uint32 len = max(nNotInserted,100u) ;
+			
+			auto oldCap = ppPairs.capacity();
+			
+			ppPairs.increaseCapacityBy(len);
+			
+			INFORMATION<< "Particle-particle contact pair container capacity increased from "<<
+			oldCap << " to "<<ppPairs.capacity()<<" in boundary contact search in "<< name <<END_INFO;
+			
+		}
+
+	}	
+	
+    return true;
+}

src/Interaction/contactSearch/boundaries/twoPartContactSearch/twoPartContactSearch.hpp

@@ -0,0 +1,104 @@
+/*------------------------------- phasicFlow ---------------------------------
+	  O        C enter of
+	 O O       E ngineering and
+	O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+#ifndef __twoPartContactSearch_hpp__
+#define __twoPartContactSearch_hpp__
+
+#include "contactSearchGlobals.hpp"
+#include "scatteredFieldAccess.hpp"
+#include "cells.hpp"
+#include "VectorSingles.hpp"
+
+namespace pFlow
+{
+
+class twoPartContactSearch
+{
+public:
+	using HeadType = deviceViewType3D<uint32>;
+
+	using NextType = deviceViewType1D<uint32>;
+
+private:
+
+	cells    searchCells_;
+
+	HeadType head_{ "periodic::head", 1, 1, 1 };
+
+	NextType next_{ "periodic::next", 1 };
+
+	real     sizeRatio_ = 1.0;
+
+	uint32   nextCapacity_ = 0;
+
+	void checkAllocateNext(uint32 n);
+
+	void nullifyHead();
+
+	void nullifyNext(uint32 n);
+
+	void buildList(
+		const deviceScatteredFieldAccess<realx3> &points);
+
+public:
+	twoPartContactSearch(
+		const box &domain,
+		real cellSize,
+		real sizeRatio = 1.0);
+
+	/// @brief Perform a broad-search for spheres in two adjacent regions.
+	/// Region 1 is considered as the master (primary) region and region 2 as slave 
+	/// @param ppPairs pairs container which holds i and j
+	/// @param points1 point positions in region 1
+	/// @param diams1  diameter of spheres in region 1
+	/// @param points2 point positions in region 2
+	/// @param diams2 diameter of spheres in region 2
+	/// @param transferVec a vector to transfer points from region 2 to region 1
+	/// @return true if it is successful 
+	bool broadSearchPP(
+		csPairContainerType &ppPairs,
+		const deviceScatteredFieldAccess<realx3> &points1,
+		const deviceScatteredFieldAccess<real> &diams1,
+		const deviceScatteredFieldAccess<realx3> &points2,
+		const deviceScatteredFieldAccess<real> &diams2,
+		const realx3 &transferVec);
+	
+	bool broadSearchPP(
+		csPairContainerType &ppPairs,
+		const deviceScatteredFieldAccess<realx3> &points1,
+		const deviceScatteredFieldAccess<real> &diams1,
+		const realx3Vector_D& points2,
+		const realVector_D& diams2,
+		const word& name);
+
+	const auto& searchCells()const
+	{
+		return searchCells_;
+	}
+
+	real sizeRatio()const
+	{
+		return sizeRatio_;
+	}
+};
+
+}
+
+#endif //__twoPartContactSearch_hpp__

src/Interaction/contactSearch/boundaries/twoPartContactSearch/twoPartContactSearchKernels.cpp

@@ -0,0 +1,186 @@
+#include "twoPartContactSearchKernels.hpp"
+
+INLINE_FUNCTION_HD
+bool
+sphereSphereCheckB(
+  const pFlow::realx3& p1,
+  const pFlow::realx3  p2,
+  pFlow::real          d1,
+  pFlow::real          d2
+)
+{
+	return pFlow::length(p2 - p1) < 0.5 * (d2 + d1);
+}
+
+void
+pFlow::twoPartContactSearchKernels::buildNextHead(
+  const deviceScatteredFieldAccess<realx3>& points,
+  const cells&                              searchCells,
+  deviceViewType3D<uint32>&                 head,
+  deviceViewType1D<uint32>&                 next
+)
+{
+	
+	uint32 n = points.size();
+
+	Kokkos::parallel_for(
+	  "pFlow::ppwBndryContactSearch::buildList",
+	  deviceRPolicyStatic(0, n),
+	  LAMBDA_HD(uint32 i) {
+		  int32x3 ind;
+		  if (searchCells.pointIndexInDomain(points[i], ind))
+		  {
+			  // discards points out of searchCell
+			  uint32 old =
+			    Kokkos::atomic_exchange(&head(ind.x(), ind.y(), ind.z()), i);
+			  next[i] = old;
+		  }
+	  }
+	);
+	Kokkos::fence();
+}
+
+pFlow::uint32
+pFlow::twoPartContactSearchKernels::broadSearchPP(
+  csPairContainerType&                      ppPairs,
+  const deviceScatteredFieldAccess<realx3>& points,
+  const deviceScatteredFieldAccess<real>&   diams,
+  const deviceScatteredFieldAccess<realx3>& mirrorPoints,
+  const deviceScatteredFieldAccess<real>&   mirrorDiams,
+  const realx3&                             transferVec,
+  const deviceViewType3D<uint32>&           head,
+  const deviceViewType1D<uint32>&           next,
+  const cells&                              searchCells,
+  const real                                sizeRatio
+)
+{
+	if (points.empty())
+		return 0;
+	if (mirrorPoints.empty())
+		return 0;
+
+	auto   nMirror = mirrorPoints.size();
+
+	uint32 getFull = 0;
+
+	Kokkos::parallel_reduce(
+	  "pFlow::twoPartContactSearchKernels::broadSearchPP",
+	  deviceRPolicyStatic(0, nMirror),
+	  LAMBDA_HD(const uint32 mrrI, uint32& getFullUpdate) {
+		  realx3  p_m = mirrorPoints(mrrI) + transferVec;
+
+		  int32x3 ind_m;
+		  if (!searchCells.pointIndexInDomain(p_m, ind_m))
+			  return;
+
+		  real d_m = sizeRatio * mirrorDiams[mrrI];
+
+		  for (int ii = -1; ii < 2; ii++)
+		  {
+			  for (int jj = -1; jj < 2; jj++)
+			  {
+				  for (int kk = -1; kk < 2; kk++)
+				  {
+					  auto ind = ind_m + int32x3{ ii, jj, kk };
+
+					  if (!searchCells.inCellRange(ind))
+						  continue;
+
+					  uint32 thisI = head(ind.x(), ind.y(), ind.z());
+					  while (thisI !=  static_cast<uint32>(-1))
+					  {
+						  auto d_n = sizeRatio * diams[thisI];
+
+						  // first item is for this boundary and second itme,
+						  // for mirror
+						  if(sphereSphereCheckB(p_m, points[thisI], d_m, d_n)&&
+                       ppPairs.insert(thisI,mrrI) == static_cast<uint32>(-1))
+						  {
+							  getFullUpdate++;
+						  }
+
+						  thisI = next(thisI);
+					  }
+				  }
+			  }
+		  }
+	  },
+	  getFull
+	);
+
+	return getFull;
+}
+
+pFlow::uint32
+pFlow::twoPartContactSearchKernels::broadSearchPP(
+  csPairContainerType&                      ppPairs,
+  const deviceScatteredFieldAccess<realx3>& points1,
+  const deviceScatteredFieldAccess<real>&   diams1,
+  const realx3Vector_D&                     points2,
+  const realVector_D&                       diams2,
+  const deviceViewType3D<uint32>&           head,
+  const deviceViewType1D<uint32>&           next,
+  const cells&                              searchCells,
+  real                                      sizeRatio
+)
+{
+	if (points1.empty())
+		return 0;
+	if (points2.empty())
+		return 0;
+
+	auto   nP2         = points2.size();
+	auto   points2View = points2.deviceView();
+	auto   diams2View  = diams2.deviceView();
+
+	uint32 getFull = 0;
+
+	Kokkos::parallel_reduce(
+	  "pFlow::twoPartContactSearchKernels::broadSearchPP",
+	  deviceRPolicyStatic(0, nP2),
+	  LAMBDA_HD(const uint32 i2, uint32& getFullUpdate) {
+		  realx3  p_m = points2View(i2);
+
+		  int32x3 ind_m;
+		  if (!searchCells.pointIndexInDomain(p_m, ind_m))
+			  return;
+
+		  real d_m = sizeRatio * diams2View[i2];
+
+		  for (int ii = -1; ii < 2; ii++)
+		  {
+			  for (int jj = -1; jj < 2; jj++)
+			  {
+				  for (int kk = -1; kk < 2; kk++)
+				  {
+					  auto ind = ind_m + int32x3{ ii, jj, kk };
+
+					  if (!searchCells.inCellRange(ind))
+					  {
+						  continue;
+					  }
+
+					  uint32 i1 = head(ind.x(), ind.y(), ind.z());
+					  while (i1 != static_cast<uint32>(-1))
+					  {
+						  auto d_n = sizeRatio * diams1[i1];
+
+						  // first item is for this boundary and second itme,
+						  // for mirror
+						  if(sphereSphereCheckB(p_m, points1[i1], d_m, d_n)&&
+                       ppPairs.insert(i1,i2) == static_cast<uint32>(-1))
+						  {
+							  getFullUpdate++;
+						  }
+
+						  i1 = next(i1);
+					  }
+				  }
+			  }
+		  }
+	  },
+	  getFull
+	);
+
+	return getFull;
+}

src/Interaction/contactSearch/boundaries/twoPartContactSearch/twoPartContactSearchKernels.hpp

@@ -0,0 +1,49 @@
+#ifndef __twoPartContactSearchKernels_hpp__
+#define __twoPartContactSearchKernels_hpp__
+
+#include "contactSearchGlobals.hpp"
+#include "cells.hpp"
+#include "contactSearchFunctions.hpp"
+#include "scatteredFieldAccess.hpp"
+#include "VectorSingles.hpp"
+
+namespace pFlow::twoPartContactSearchKernels
+{
+
+void buildNextHead(
+    const deviceScatteredFieldAccess<realx3> &points,
+    const cells              &searchCells,
+    deviceViewType3D<uint32> &head, 
+    deviceViewType1D<uint32> &next );
+
+
+uint32 broadSearchPP
+(
+	csPairContainerType 						&ppPairs,
+	const deviceScatteredFieldAccess<realx3> 	&points, 
+	const deviceScatteredFieldAccess<real> 		&diams, 
+	const deviceScatteredFieldAccess<realx3>	&mirrorPoints, 
+	const deviceScatteredFieldAccess<real> 		&mirrorDiams, 
+	const realx3 								&transferVec,
+    const deviceViewType3D<uint32>				&head,
+    const deviceViewType1D<uint32>				&next,
+    const cells									&searchCells,
+	real sizeRatio
+);
+
+uint32
+broadSearchPP(
+	csPairContainerType&                      ppPairs,
+	const deviceScatteredFieldAccess<realx3>& points1,
+	const deviceScatteredFieldAccess<real>&   diams1,
+	const realx3Vector_D&                     points2,
+	const realVector_D&                       diams2,
+	const deviceViewType3D<uint32>&           head,
+	const deviceViewType1D<uint32>&           next,
+	const cells&                              searchCells,
+	real                                      sizeRatio
+);
+}
+
+
+#endif //__twoPartContactSearchKernels_hpp__

src/Interaction/sphereInteraction/boundaries/processorBoundarySphereInteraction/processorBoundarySIKernels.hpp

@@ -0,0 +1,132 @@
+
+#ifndef __processorBoundarySIKernels_hpp__
+#define __processorBoundarySIKernels_hpp__
+
+namespace pFlow::MPI::processorBoundarySIKernels
+{
+
+template<typename ContactListType, typename ContactForceModel>
+inline
+void sphereSphereInteraction
+(
+    const word& kernalName,
+    real dt,
+    const ContactListType&              cntctList,
+    const ContactForceModel&            forceModel,
+    const deviceScatteredFieldAccess<realx3>& thisPoints,
+    const deviceViewType1D<real>& thisDiam,
+    const deviceViewType1D<uint32>& thisPropId,
+    const deviceViewType1D<realx3>& thisVel,
+    const deviceViewType1D<realx3>& thisRVel,
+    const deviceViewType1D<realx3>& thisCForce,
+    const deviceViewType1D<realx3>& thisCTorque,
+    const deviceViewType1D<realx3>& neighborPoints,
+    const deviceViewType1D<real>& neighborDiam,
+    const deviceViewType1D<uint32>& neighborPropId,
+    const deviceViewType1D<realx3>& neighborVel,
+    const deviceViewType1D<realx3>& neighborRVel,
+    const deviceViewType1D<realx3>& neighborCForce,
+    const deviceViewType1D<realx3>& neighborCTorque
+)
+{
+    
+    using ValueType = typename ContactListType::ValueType;
+    uint32 ss = cntctList.size();
+    if(ss == 0u)return;
+
+    uint32 lastItem = cntctList.loopCount();
+
+    Kokkos::parallel_for(
+        kernalName,
+        deviceRPolicyDynamic(0,lastItem),
+        LAMBDA_HD(uint32 n)
+        {
+
+        if(!cntctList.isValid(n))return;
+
+            auto [i,j] = cntctList.getPair(n);
+            uint32 ind_i = thisPoints.index(i);
+            uint32 ind_j = j;
+
+            real Ri = 0.5*thisDiam[ind_i];
+            real Rj = 0.5*neighborDiam[ind_j];
+            realx3 xi = thisPoints.field()[ind_i];
+            realx3 xj = neighborPoints[ind_j];
+
+            real dist = length(xj-xi);
+            real ovrlp = (Ri+Rj) - dist;
+            
+            if( ovrlp >0.0 )
+            {
+                auto Nij = (xj-xi)/max(dist,smallValue);
+                auto wi = thisRVel[ind_i];
+                auto wj = neighborRVel[ind_j];
+                auto Vr = thisVel[ind_i] - neighborVel[ind_j] + cross((Ri*wi+Rj*wj), Nij);
+                
+                auto history = cntctList.getValue(n);
+
+                int32 propId_i = thisPropId[ind_i];
+                int32 propId_j = neighborPropId[ind_j];
+
+                realx3 FCn, FCt, Mri, Mrj, Mij, Mji;
+
+                // calculates contact force 
+                forceModel.contactForce(
+                    dt, i, j,
+                    propId_i, propId_j,
+                    Ri, Rj,
+                    ovrlp,
+                    Vr, Nij,
+                    history,
+                    FCn, FCt);
+
+                forceModel.rollingFriction(
+                    dt, i, j,
+                    propId_i, propId_j,
+                    Ri, Rj,
+                    wi, wj,
+                    Nij,
+                    FCn,
+                    Mri, Mrj);
+
+                auto M = cross(Nij,FCt);
+                Mij = Ri*M+Mri;
+                Mji = Rj*M+Mrj;
+                
+                auto FC = FCn + FCt;
+                
+
+                Kokkos::atomic_add(&thisCForce[ind_i].x_,FC.x_);
+                Kokkos::atomic_add(&thisCForce[ind_i].y_,FC.y_);
+                Kokkos::atomic_add(&thisCForce[ind_i].z_,FC.z_);
+
+                Kokkos::atomic_add(&neighborCForce[ind_j].x_,-FC.x_);
+                Kokkos::atomic_add(&neighborCForce[ind_j].y_,-FC.y_);
+                Kokkos::atomic_add(&neighborCForce[ind_j].z_,-FC.z_);
+
+                Kokkos::atomic_add(&thisCTorque[ind_i].x_, Mij.x_);
+                Kokkos::atomic_add(&thisCTorque[ind_i].y_, Mij.y_);
+                Kokkos::atomic_add(&thisCTorque[ind_i].z_, Mij.z_);
+
+                Kokkos::atomic_add(&neighborCTorque[ind_j].x_, Mji.x_);
+                Kokkos::atomic_add(&neighborCTorque[ind_j].y_, Mji.y_);
+                Kokkos::atomic_add(&neighborCTorque[ind_j].z_, Mji.z_);
+                
+
+                cntctList.setValue(n,history);
+
+            }
+            else
+            {
+                cntctList.setValue(n, ValueType());
+            }
+
+        });
+    Kokkos::fence();
+}
+
+
+} //pFlow::MPI::processorBoundarySIKernels
+
+
+#endif //__processorBoundarySIKernels_hpp__

src/Interaction/sphereInteraction/boundaries/processorBoundarySphereInteraction/processorBoundarySphereInteraction.cpp

@@ -0,0 +1,256 @@
+/*------------------------------- phasicFlow ---------------------------------
+	  O        C enter of
+	 O O       E ngineering and
+	O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+#include "processorBoundarySIKernels.hpp"
+
+template <typename cFM, typename gMM>
+pFlow::MPI::processorBoundarySphereInteraction<cFM, gMM>::processorBoundarySphereInteraction(
+	const boundaryBase &boundary,
+	const sphereParticles &sphPrtcls,
+	const GeometryMotionModel &geomMotion)
+: 
+	boundarySphereInteraction<cFM,gMM>(
+		boundary, 
+		sphPrtcls, 
+		geomMotion
+	),
+	masterInteraction_(boundary.isBoundaryMaster())
+{
+	if(masterInteraction_)
+	{
+		this->allocatePPPairs();
+		this->allocatePWPairs();
+	}
+		
+}
+
+
+#ifdef BoundaryModel1
+
+template <typename cFM, typename gMM>
+bool pFlow::MPI::processorBoundarySphereInteraction<cFM, gMM>::sphereSphereInteraction
+(
+	real dt,
+	const ContactForceModel &cfModel,
+	uint32 step
+)
+{
+	
+	// master processor calculates the contact force/torque and sends data back to the 
+	// neighbor processor (slave processor).
+	// slave processor recieves the data and adds the data to the internalField 
+	if(masterInteraction_) 
+	{
+		if(step==1)return true;
+
+		const auto & sphPar = this->sphParticles();
+		uint32 thisIndex = this->boundary().thisBoundaryIndex();
+		
+		const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&> (
+		sphPar.contactForce().BoundaryField(thisIndex));
+
+		const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+		sphPar.contactTorque().BoundaryField(thisIndex));
+
+		if(step == 2 )
+		{
+			iter++;
+			pFlow::MPI::processorBoundarySIKernels::sphereSphereInteraction(
+				"ppBoundaryInteraction."+this->boundaryName(),
+				dt,
+				this->ppPairs(),
+				cfModel,
+				this->boundary().thisPoints(),
+				sphPar.diameter().deviceViewAll(),
+				sphPar.propertyId().deviceViewAll(),
+				sphPar.velocity().deviceViewAll(),
+				sphPar.rVelocity().deviceViewAll(),
+				sphPar.contactForce().deviceViewAll(),
+				sphPar.contactTorque().deviceViewAll(),
+				this->boundary().neighborProcPoints().deviceViewAll(),
+				sphPar.diameter().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.propertyId().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.velocity().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.rVelocity().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				cfBndry.neighborProcField().deviceViewAll(),
+				ctBndry.neighborProcField().deviceViewAll()
+			);
+			
+			return true;
+		}		
+		else if(step == 3 )
+		{
+			cfBndry.sendBackData();
+			ctBndry.sendBackData();
+			
+			return true;
+		}
+		
+		
+		return false;	
+	}
+	else
+	{
+		
+		if(step == 1 )
+		{
+			const auto & sphPar = this->sphParticles();
+			uint32 thisIndex = this->boundary().thisBoundaryIndex();
+			const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&>(
+			sphPar.contactForce().BoundaryField(thisIndex));
+			const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+			sphPar.contactTorque().BoundaryField(thisIndex));
+
+			cfBndry.recieveBackData();
+			ctBndry.recieveBackData();
+			
+			return false;
+		}
+		else if(step == 11)
+		{
+			const auto & sphPar = this->sphParticles();
+			uint32 thisIndex = this->boundary().thisBoundaryIndex();
+			const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&>(
+			sphPar.contactForce().BoundaryField(thisIndex));
+			const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+			sphPar.contactTorque().BoundaryField(thisIndex));
+
+			cfBndry.addBufferToInternalField();
+			ctBndry.addBufferToInternalField();
+	
+			return true;
+		}
+		
+		
+		return false;
+	}
+
+	return false;
+}
+#else
+
+template <typename cFM, typename gMM>
+bool pFlow::MPI::processorBoundarySphereInteraction<cFM, gMM>::sphereSphereInteraction
+(
+	real dt,
+	const ContactForceModel &cfModel,
+	uint32 step
+)
+{
+	
+	// master processor calculates the contact force/torque and sends data back to the 
+	// neighbor processor (slave processor).
+	// slave processor recieves the data and adds the data to the internalField 
+	if(masterInteraction_) 
+	{
+		if(step==1)return true;
+
+		const auto & sphPar = this->sphParticles();
+		uint32 thisIndex = this->boundary().thisBoundaryIndex();
+		
+		const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&> (
+		sphPar.contactForce().BoundaryField(thisIndex));
+
+		const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+		sphPar.contactTorque().BoundaryField(thisIndex));
+
+		if(step == 2 )
+		{
+			
+			pFlow::MPI::processorBoundarySIKernels::sphereSphereInteraction(
+				"ppBoundaryInteraction."+this->boundaryName(),
+				dt,
+				this->ppPairs(),
+				cfModel,
+				this->boundary().thisPoints(),
+				sphPar.diameter().deviceViewAll(),
+				sphPar.propertyId().deviceViewAll(),
+				sphPar.velocity().deviceViewAll(),
+				sphPar.rVelocity().deviceViewAll(),
+				sphPar.contactForce().deviceViewAll(),
+				sphPar.contactTorque().deviceViewAll(),
+				this->boundary().neighborProcPoints().deviceViewAll(),
+				sphPar.diameter().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.propertyId().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.velocity().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				sphPar.rVelocity().BoundaryField(thisIndex).neighborProcField().deviceViewAll(),
+				cfBndry.neighborProcField().deviceViewAll(),
+				ctBndry.neighborProcField().deviceViewAll()
+			);
+		
+			return true;
+		}		
+		else if(step == 3 )
+		{
+			cfBndry.sendBackData();
+			ctBndry.sendBackData();
+			return true;
+		}
+		else if(step == 11 )
+		{
+			cfBndry.updateBoundaryFromSlave();
+			ctBndry.updateBoundaryFromSlave();
+			return true;
+		}
+
+		return false;	
+	}
+	else
+	{
+		
+		if(step == 1 )
+		{
+			const auto & sphPar = this->sphParticles();
+			uint32 thisIndex = this->boundary().thisBoundaryIndex();
+			const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&>(
+			sphPar.contactForce().BoundaryField(thisIndex));
+			const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+			sphPar.contactTorque().BoundaryField(thisIndex));
+
+			cfBndry.recieveBackData();
+			ctBndry.recieveBackData();
+			
+			return false;
+		}
+		else if(step == 11)
+		{
+			const auto & sphPar = this->sphParticles();
+			uint32 thisIndex = this->boundary().thisBoundaryIndex();
+			const auto& cfBndry = static_cast<const processorBoundaryField<realx3>&>(
+			sphPar.contactForce().BoundaryField(thisIndex));
+			const auto& ctBndry = static_cast<const processorBoundaryField<realx3>&> (
+			sphPar.contactTorque().BoundaryField(thisIndex));
+
+			cfBndry.addBufferToInternalField();
+			cfBndry.updateBoundaryToMaster();
+
+			ctBndry.addBufferToInternalField();
+			ctBndry.updateBoundaryToMaster();
+
+			return true;
+		}
+				
+		return false;
+	}
+
+	return false;
+}
+
+#endif

src/Interaction/sphereInteraction/boundaries/processorBoundarySphereInteraction/processorBoundarySphereInteraction.hpp

@@ -0,0 +1,93 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow       
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------  
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating 
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions. 
+ 
+  phasicFlow is distributed to help others in their research in the field of 
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+#ifndef __processorBoundarySphereInteraction_hpp__
+#define __processorBoundarySphereInteraction_hpp__
+
+#include "boundarySphereInteraction.hpp"
+#include "processorBoundaryField.hpp"
+#include "boundaryProcessor.hpp"
+
+namespace pFlow::MPI
+{
+
+template<typename contactForceModel,typename geometryMotionModel>
+class processorBoundarySphereInteraction
+:
+    public boundarySphereInteraction<contactForceModel, geometryMotionModel>
+{
+public:
+
+    using PBSInteractionType = 
+        processorBoundarySphereInteraction<contactForceModel,geometryMotionModel>;
+
+    using BSInteractionType = 
+        boundarySphereInteraction<contactForceModel, geometryMotionModel>;
+
+    using GeometryMotionModel 	= typename BSInteractionType::GeometryMotionModel;
+	
+	using ContactForceModel 	= typename BSInteractionType::ContactForceModel;
+
+	using MotionModel 			= typename geometryMotionModel::MotionModel;
+
+	using ModelStorage 			= typename ContactForceModel::contactForceStorage;
+	
+	using IdType 			    = typename BSInteractionType::IdType;
+
+	using IndexType    		    = typename BSInteractionType::IndexType;
+    
+    using ContactListType       = typename BSInteractionType::ContactListType; 
+
+private:
+    
+    bool    masterInteraction_;
+
+public:
+
+    TypeInfoTemplate22("boundarySphereInteraction", "processor",ContactForceModel, MotionModel);
+
+	
+    processorBoundarySphereInteraction(
+        const boundaryBase& boundary,
+		const sphereParticles& sphPrtcls,
+		const GeometryMotionModel& geomMotion
+    );
+
+    add_vCtor
+    (
+        BSInteractionType,
+        PBSInteractionType,
+        boundaryBase
+    );
+    
+    ~processorBoundarySphereInteraction()override = default;
+
+    bool sphereSphereInteraction(
+        real dt,
+		const ContactForceModel& cfModel,
+        uint32 step)override;
+	
+};
+
+}
+
+#include "processorBoundarySphereInteraction.cpp"
+
+
+#endif //__processorBoundarySphereInteraction_hpp__

src/Interaction/sphereInteraction/boundaries/processorBoundarySphereInteraction/processorBoundarySphereInteractions.cpp

@@ -0,0 +1,17 @@
+
+#include "processorBoundarySphereInteraction.hpp"
+#include "geometryMotions.hpp"
+#include "contactForceModels.hpp"
+
+
+template class pFlow::MPI::processorBoundarySphereInteraction
+<
+    pFlow::cfModels::limitedNonLinearNormalRolling,
+    pFlow::rotationAxisMotionGeometry
+>;
+
+template class pFlow::MPI::processorBoundarySphereInteraction
+<
+    pFlow::cfModels::nonLimitedNonLinearNormalRolling,
+    pFlow::rotationAxisMotionGeometry
+>;

src/Interaction/sphereInteraction/sphereInteraction/sphereInteraction.cpp

@@ -359,7 +359,7 @@ bool pFlow::sphereInteraction<cFM,gMM, cLT>::hearChanges
 	if(msg.equivalentTo(message::ITEMS_REARRANGE))
 	{
 		notImplementedFunction;
-		return false;
+		return true;
 	}
 	
 	fatalErrorInFunction<<"Event "<< msg.eventNames()<<

src/Particles/SphereParticles/processorBoundarySphereParticles.cpp

@@ -0,0 +1,46 @@
+#include "processorBoundarySphereParticles.hpp"
+#include "sphereParticles.hpp"
+#include "boundaryProcessor.hpp"
+
+pFlow::processorBoundarySphereParticles::processorBoundarySphereParticles(
+    const boundaryBase &boundary, 
+    sphereParticles &prtcls
+)
+:
+    boundarySphereParticles(boundary, prtcls)
+{
+
+}
+
+bool pFlow::processorBoundarySphereParticles::acceleration(const timeInfo &ti, const realx3& g)
+{
+    
+
+#ifndef BoundaryModel1
+    
+
+    if(isBoundaryMaster())
+    {
+        auto thisIndex = thisBoundaryIndex();
+        auto mass = Particles().mass().BoundaryField(thisIndex).neighborProcField().deviceView();
+        auto I = Particles().I().BoundaryField(thisIndex).neighborProcField().deviceView();
+        auto cf = Particles().contactForce().BoundaryField(thisIndex).neighborProcField().deviceView();
+        auto ct = Particles().contactTorque().BoundaryField(thisIndex).neighborProcField().deviceView();
+        auto acc = Particles().acceleration().BoundaryField(thisIndex).neighborProcField().deviceView();
+        auto rAcc = Particles().rAcceleration().BoundaryField(thisIndex).neighborProcField().deviceView();
+
+        Kokkos::parallel_for(
+            "processorBoundary::acceleration."+this->boundaryName(),
+            deviceRPolicyStatic(0,mass.size()),
+            LAMBDA_HD(uint32 i){
+                acc[i] = cf[i]/mass[i] + g;
+                rAcc[i] = ct[i]/I[i];
+            });
+        Kokkos::fence();    
+    }
+
+#endif
+    
+
+    return true;
+}

src/Particles/SphereParticles/processorBoundarySphereParticles.hpp

@@ -0,0 +1,38 @@
+#ifndef __processorBoundarySphereParticles_hpp__
+#define __processorBoundarySphereParticles_hpp__
+
+#include "boundarySphereParticles.hpp"
+
+namespace pFlow
+{
+
+class processorBoundarySphereParticles
+:
+    public boundarySphereParticles
+{
+
+public:
+
+    /// type info
+    TypeInfo("boundarySphereParticles<MPI,processor>");
+
+    processorBoundarySphereParticles(
+        const boundaryBase &boundary,
+        sphereParticles&  prtcls
+    );
+
+    add_vCtor(
+        boundarySphereParticles,
+        processorBoundarySphereParticles,
+        boundaryBase
+    );
+
+    bool acceleration(const timeInfo& ti, const realx3& g)override;
+    
+
+};
+
+}
+
+
+#endif

src/Particles/particles/MPIParticleIdHandler/MPIParticleIdHandler.cpp

@@ -0,0 +1,70 @@
+#include "MPIParticleIdHandler.hpp"
+#include "procCommunication.hpp"
+
+pFlow::MPI::MPIParticleIdHandler::MPIParticleIdHandler
+(
+    pointStructure& pStruct
+)
+:
+    particleIdHandler(pStruct)
+{
+    initialIdCheck();
+}
+
+pFlow::Pair<pFlow::uint32, pFlow::uint32> 
+    pFlow::MPI::MPIParticleIdHandler::getIdRange(uint32 nNewParticles)
+{
+    uint32 startId;
+    if(maxId_==-1)
+    {
+        startId = 0;
+    }
+    else
+    {
+        startId = maxId_+1;
+    }
+    uint32 endId = startId+nNewParticles-1;
+    maxId_ = endId;
+    return {startId, endId};
+}
+
+bool pFlow::MPI::MPIParticleIdHandler::initialIdCheck()
+{
+    /// empty point structure / no particles in simulation
+    uint32 maxId = -1;
+    if( !pStruct().empty() ) 
+    {
+        maxId = max( *this );
+    }    
+    
+    auto maxIdAll = procVector<uint32>(pFlowProcessors());
+    auto numAll = procVector<uint32>(pFlowProcessors());
+    auto comm = procCommunication(pFlowProcessors());
+
+    comm.collectAllToAll(maxId, maxIdAll);
+    comm.collectAllToAll(size(),numAll);
+    
+    uint32 n = 0;
+    for(uint32 i=0; i<maxIdAll.size(); i++)
+    {
+        if( maxIdAll[i]==-1 && numAll[i]!= 0)
+        {
+            if(comm.localRank() == i)
+            {
+                fillSequence(*this, n);
+                maxId_ = size()-1 + n;
+            }
+            
+        }
+        else
+        {
+            if(comm.localRank() == i)
+            {
+                maxId_ = maxIdAll[i];
+            }
+        }
+        n += numAll[i];
+    }
+    
+    return true;
+}

src/Particles/particles/MPIParticleIdHandler/MPIParticleIdHandler.hpp

@@ -0,0 +1,60 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+#ifndef __MPIParticleIdHandler_hpp__
+#define __MPIParticleIdHandler_hpp__
+
+#include "particleIdHandler.hpp"
+
+namespace pFlow::MPI
+{
+
+class MPIParticleIdHandler : public particleIdHandler
+{
+private:
+
+	uint32 maxId_ = -1;
+
+	bool   initialIdCheck() override;
+
+public:
+
+	ClassInfo("particleIdHandler<MPI>");
+
+	explicit MPIParticleIdHandler(pointStructure& pStruct);
+
+	~MPIParticleIdHandler() override = default;
+
+	add_vCtor(
+    particleIdHandler, 
+    MPIParticleIdHandler, 
+    pointStructure
+  );
+
+	Pair<uint32, uint32> getIdRange(uint32 nNewParticles) override;
+
+	uint32               maxId() const override
+	{
+		return maxId_;
+	}
+};
+
+}
+
+#endif //__MPIParticleIdHandler_hpp__

src/Particles/particles/particles.hpp

@@ -185,6 +185,18 @@ public:
 		return contactTorque_;
 	}
 
+	inline 
+	uint32PointField_D& particleId()
+	{
+		return idHandler_();
+	}
+
+	inline
+	const uint32PointField_D& particleId() const
+	{
+		return idHandler_();
+	}
+
 	inline 
 	uint32 maxId()const
 	{

src/PostprocessData/CMakeLists.txt

@@ -9,9 +9,11 @@ set(SourceFiles
     # Regions
     region/regionPoints/regionPoints/regionPoints.cpp
     region/regionPoints/sphereRegionPoints/sphereRegionPoints.cpp
+    region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
     region/regionPoints/lineRegionPoints/lineRegionPoints.cpp
     region/regionPoints/centerPointsRegionPoints/centerPointsRegionPoints.cpp
     region/regionPoints/multipleSpheresRegionPoints/multipleSpheresRegionPoints.cpp
+    region/regionPoints/rectMeshRegionPoints/rectMeshRegionPoints.cpp
 
     # Postprocess components
     postprocessComponent/postprocessComponent/postprocessComponent.cpp

src/PostprocessData/fieldsDataBase/fieldsDataBase.cpp

@@ -467,7 +467,7 @@ pFlow::postprocessData::fieldsDataBase::fieldsDataBase
     systemControl& control,
     const dictionary& postDict,
     bool inSimulation,
-    timeValue startTime
+    TimeValueType startTime
 )
 :
     time_(control.time()),
@@ -492,7 +492,7 @@ pFlow::postprocessData::fieldsDataBase::fieldsDataBase
     }
 }
 
-pFlow::timeValue pFlow::postprocessData::fieldsDataBase::currentTime() const
+pFlow::TimeValueType pFlow::postprocessData::fieldsDataBase::currentTime() const
 {
     return time_.currentTime();
 }
@@ -914,7 +914,7 @@ pFlow::uniquePtr<pFlow::postprocessData::fieldsDataBase>
     systemControl& control, 
     const dictionary& postDict, 
     bool inSimulation,
-    timeValue startTime
+    TimeValueType startTime
 )
 {
     word dbType;

src/PostprocessData/fieldsDataBase/fieldsDataBase.hpp

@@ -78,7 +78,7 @@ private:
         anyList             allFields_;
 
         /// Map to store the last capture time of each field
-        wordMap<timeValue>  captureTime_;
+        wordMap<TimeValueType>  captureTime_;
 
         /// Reference to the Time object
         Time&               time_; 
@@ -178,7 +178,7 @@ public:
             systemControl& control, 
             const dictionary& postDict,
             bool inSimulation,
-            timeValue startTime);
+            TimeValueType startTime);
 
         /// no copy constructor
         fieldsDataBase(const fieldsDataBase&) = delete;
@@ -203,7 +203,7 @@ public:
                 systemControl& control, 
                 const dictionary& postDict, 
                 bool inSimulation,
-                timeValue startTime
+                TimeValueType startTime
             ),
             (control, postDict, inSimulation, startTime)
         );
@@ -211,7 +211,7 @@ public:
     
     // - Public Access Functions
         /// returns the current time
-        timeValue currentTime()const;
+        TimeValueType currentTime()const;
 
         /// const ref to object Time 
         const Time& time()const 
@@ -282,7 +282,7 @@ public:
         /// Get the next avaiable time folder after the current time folder 
         /// This is only used for post-simulation processing 
         virtual
-        timeValue getNextTimeFolder()const
+        TimeValueType getNextTimeFolder()const
         {
             return -1.0;
         }
@@ -291,7 +291,7 @@ public:
         /// This is used only for post-simulation processing
         /// @returns the time value of the next folder.
         virtual 
-        timeValue setToNextTimeFolder()
+        TimeValueType setToNextTimeFolder()
         {
             return -1.0;
         }
@@ -300,7 +300,7 @@ public:
         /// This is used only for post-simulation processing 
         /// @returns the time value of the skipped folder 
         virtual 
-        timeValue skipNextTimeFolder()
+        TimeValueType skipNextTimeFolder()
         {
             return -1.0;
         }
@@ -316,7 +316,7 @@ public:
         systemControl& control, 
         const dictionary& postDict, 
         bool inSimulation,
-        timeValue startTime);
+        TimeValueType startTime);
 };
 
 } // namespace pFlow::postprocessData

src/PostprocessData/fieldsDataBase/simulationFieldsDataBase.cpp

@@ -49,7 +49,7 @@ pFlow::postprocessData::simulationFieldsDataBase::simulationFieldsDataBase
     systemControl &control,
     const dictionary& postDict, 
     bool inSimulation,
-    timeValue startTime
+    TimeValueType startTime
 )
 :
     fieldsDataBase(control, postDict, inSimulation, startTime),

src/PostprocessData/fieldsDataBase/simulationFieldsDataBase.hpp

@@ -60,7 +60,7 @@ public:
         systemControl& control, 
         const dictionary& postDict,
         bool inSimulation,
-        timeValue startTime);
+        TimeValueType startTime);
 
     ~simulationFieldsDataBase() override = default;
 

src/PostprocessData/operation/PostprocessOperation/PostprocessOperationAverage.cpp

@@ -178,4 +178,26 @@ bool PostprocessOperationAverage::write(const fileSystem &parDir) const
     return true;
 }
 
+bool PostprocessOperationAverage::write(iOstream &os) const
+{
+    if(! postprocessOperation::write(os))
+    {
+        return false;
+    }
+    if(!calculateFluctuation2_())
+    {
+        return true;
+    }
+    
+    return 
+        std::visit
+        (
+            [&](auto&& arg)->bool
+            {
+                return arg.writeFieldToVtk(os);
+            },
+            fluctuation2FieldPtr_()
+        );
+}
+
 } // namespace pFlow::postprocessData

src/PostprocessData/operation/PostprocessOperation/PostprocessOperationAverage.hpp

@@ -195,6 +195,8 @@ public:
     /// write to os stream
     bool write(const fileSystem &parDir)const override;
 
+    bool write(iOstream& os)const override;
+
 
     /// @brief Execute average operation on field values
     /// @param weights Weight factors for particles

src/PostprocessData/operation/PostprocessOperation/operationFunctions.hpp

@@ -142,7 +142,7 @@ regionField<T> executeFluctuation2Operation
 )
 {
     const auto& regPoints = fieldAvg.regPoints();
-    regionField<T> processedField(regFieldName, regPoints, T{});
+    regionField<T> processedField(regFieldName+"_fluctuation2", regPoints, T{});
     auto vols = regPoints.volumes();
 
     for(uint32 reg =0; reg<regPoints.size(); reg++)

src/PostprocessData/operation/includeMask/IncludeMask.hpp

@@ -86,12 +86,12 @@ private:
     word                    fieldName_;
     
     /// Timestamp when mask was last updated (-1 indicates never updated)
-    timeValue               lastUpdated_ = -1;
+    TimeValueType               lastUpdated_ = -1;
 
     /// Updates the mask based on current field values if needed, returns true if successful
     bool updateMask()
     {
-        timeValue t = database().currentTime();
+        TimeValueType t = database().currentTime();
         
         if( equal( t, lastUpdated_)) return true;
         
@@ -206,11 +206,11 @@ private:
 	
     std::vector<bool>       mask_;
 
-    timeValue               lastUpdated_ = -1;
+    TimeValueType               lastUpdated_ = -1;
 
     bool updateMask()
     {
-        timeValue t = database().currentTime();
+        TimeValueType t = database().currentTime();
         
         if( equal( t, lastUpdated_)) return true;
         

src/PostprocessData/operation/postprocessOperation/postprocessOperation.cpp

@@ -124,6 +124,25 @@ bool postprocessOperation::write(const fileSystem &parDir) const
     return true;
 }
 
+bool postprocessOperation::write(iOstream& os)const
+{
+    if(!regPoints().writeToSameTimeFile())
+    {
+        const auto& field = processedField();
+
+        return 
+        std::visit
+        (
+            [&](auto&& arg)->bool
+            {
+                return arg.writeFieldToVtk(os);
+            },
+            field
+        );
+    }
+    return false;
+}
+
 uniquePtr<postprocessOperation> postprocessOperation::create
 (
     const dictionary &opDict,