diff --git a/solvers/CMakeLists.txt b/solvers/CMakeLists.txt
index aa711841..7db5fd36 100644
--- a/solvers/CMakeLists.txt
+++ b/solvers/CMakeLists.txt
@@ -4,4 +4,4 @@ add_subdirectory(iterateSphereParticles)
 
 add_subdirectory(iterateGeometry)
 
-#add_subdirectory(sphereGranFlow)
+add_subdirectory(sphereGranFlow)
diff --git a/solvers/sphereGranFlow/createDEMComponents.hpp b/solvers/sphereGranFlow/createDEMComponents.hpp
index 92cf1f53..6fcbde29 100755
--- a/solvers/sphereGranFlow/createDEMComponents.hpp
+++ b/solvers/sphereGranFlow/createDEMComponents.hpp
@@ -19,11 +19,11 @@ Licence:
 -----------------------------------------------------------------------------*/
 
 //
-REPORT(0)<<"\nReading sphere particles . . ."<<endREPORT;
+REPORT(0)<<"\nReading sphere particles . . ."<<END_REPORT;
 sphereParticles sphParticles(Control, proprties);
 
 //
-REPORT(0)<<"\nCreating particle insertion object . . ."<<endREPORT;
+REPORT(0)<<"\nCreating particle insertion object . . ."<<END_REPORT;
 /*auto& sphInsertion = 
 	Control.caseSetup().emplaceObject<sphereInsertion>(
 		objectFile(
@@ -36,12 +36,12 @@ REPORT(0)<<"\nCreating particle insertion object . . ."<<endREPORT;
 		sphParticles.shapes()
 	);*/
 
-auto sphInsertion =  sphereInsertion(
+/*auto sphInsertion =  sphereInsertion(
 	Control.caseSetup().path()+insertionFile__, 
 	sphParticles, 
-	sphParticles.shapes());
+	sphParticles.shapes());*/
 
-REPORT(0)<<"\nCreating interaction model for sphere-sphere contact and sphere-wall contact . . ."<<endREPORT;
+REPORT(0)<<"\nCreating interaction model for sphere-sphere contact and sphere-wall contact . . ."<<END_REPORT;
 auto interactionPtr = interaction::create(
 	Control,
 	sphParticles,
diff --git a/solvers/sphereGranFlow/sphereGranFlow.cpp b/solvers/sphereGranFlow/sphereGranFlow.cpp
index da435776..c36bc987 100755
--- a/solvers/sphereGranFlow/sphereGranFlow.cpp
+++ b/solvers/sphereGranFlow/sphereGranFlow.cpp
@@ -30,30 +30,22 @@ Licence:
  * (https://github.com/PhasicFlow/phasicFlow/tree/main/tutorials/sphereGranFlow) folder.
  */
 
+#include "vocabs.hpp"
+#include "phasicFlowKokkos.hpp"
+#include "systemControl.hpp"
+#include "commandLine.hpp"
 #include "property.hpp"
 #include "geometry.hpp"
 #include "sphereParticles.hpp"
-#include "Insertions.hpp"
-#include "systemControl.hpp"
-#include "contactSearch.hpp"
-#include "sphereInteraction.hpp"
-#include "commandLine.hpp"
-#include "readControlDict.hpp"
-
-using pFlow::output;
-using pFlow::endl;
-using pFlow::property;
-using pFlow::sphereParticles;
-using pFlow::objectFile;
-using pFlow::sphereInsertion;
-using pFlow::insertionFile__;
-using pFlow::interactionFile__;
-using pFlow::contactSearch;
-using pFlow::interaction;
-using pFlow::commandLine;
+#include "interaction.hpp"
+//#include "Insertions.hpp"
 
 
 
+//#include "readControlDict.hpp"
+
+using namespace pFlow;
+
 /**
  * DEM solver for simulating granular flow of cohesion-less particles.
  *
@@ -73,52 +65,58 @@ bool isCoupling = false;
 if(!cmds.parse(argc, argv)) return 0;
 
 // this should be palced in each main 
+processors::initProcessors(argc, argv);
+initialize_pFlowProcessors();
 #include "initialize_Control.hpp"
-	
+	 
 	#include "setProperty.hpp"
 	#include "setSurfaceGeometry.hpp"
 	
 
 	#include "createDEMComponents.hpp"
 	
-	REPORT(0)<<"\nStart of time loop . . .\n"<<endREPORT;
+	REPORT(0)<<"\nStart of time loop . . .\n"<<END_REPORT;
 
 	do 
 	{
 		
-		if(! sphInsertion.insertParticles( 
+		/*if(! sphInsertion.insertParticles( 
 			Control.time().currentTime(),
 			Control.time().dt()	) )
 		{
 			fatalError<<
 			"particle insertion failed in sphereDFlow solver.\n";
 			return 1;
-		}
-
+		}*/
+		
+		// set force to zero
 		surfGeometry.beforeIteration();
-		
-		sphInteraction.beforeIteration();
 
+		// set force to zero, predict, particle deletion and etc. 
 		sphParticles.beforeIteration();
+
+		sphInteraction.beforeIteration();
 		
+		sphInteraction.iterate();	
 		
-		sphInteraction.iterate();
+		surfGeometry.iterate();
 
 		sphParticles.iterate();
 
-		surfGeometry.iterate();
+		sphInteraction.afterIteration();
+
+		surfGeometry.afterIteration();
 
 		sphParticles.afterIteration();
-		
-		surfGeometry.afterIteration();
-		
+				
 
 	}while(Control++);
 
-	REPORT(0)<<"\nEnd of time loop.\n"<<endREPORT;
+	REPORT(0)<<"\nEnd of time loop.\n"<<END_REPORT;
 
 // this should be palced in each main 
 #include "finalize.hpp"
+processors::finalizeProcessors();
 
 
 }