diff --git a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/domainDict b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/domainDict
index c2344fc8..77dea711 100644
--- a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/domainDict
+++ b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/domainDict
@@ -6,16 +6,16 @@ objectName 	domainDict;
 objectType 	dictionary;
 fileFormat  ASCII;
 /*---------------------------------------------------------------------------*/
-globalBox 
+globalBox                    // Simulation domain: every particles that goes outside this domain will be deleted
 {
 	min (-0.12 -0.12 0);
+
 	max (0.12   0.12 0.1);
 }
 
 decomposition
 {
 	direction z;
-	
 }
 
 boundaries
@@ -25,12 +25,10 @@ boundaries
 	// of all boundaries in the simulation domain? 
 	neighborListUpdateInterval 50; 
 
-	// How often do you want to update the new changes in the 
-	// boundary
+	// How often do you want to update the new changes in the boundary
 	updateInterval 10;
 
-	// The distance from the boundary plane within which particles are 
-	// marked to be in the boundary list. 
+	// The distance from the boundary plane within which particles are marked to be in the boundary list 
 	neighborLength 0.004;
 
 	left
@@ -40,26 +38,26 @@ boundaries
 
 	right
 	{
-		type exit;
+		type exit;  // other options: periodict, reflective 
 	}
 
 	bottom
 	{
-		type exit;
+		type exit;  // other options: periodict, reflective 
 	}
 
 	top
 	{
-		type exit;
+		type exit;  // other options: periodict, reflective 
 	}
 
 	rear
 	{
-		type exit;
+		type exit;  // other options: periodict, reflective 
 	}
 
 	front
 	{
-		type exit;
+		type exit;  // other options: periodict, reflective 
 	}
 }
\ No newline at end of file
diff --git a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/geometryDict b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/geometryDict
index 8f5b0697..df536ef1 100644
--- a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/geometryDict
+++ b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/geometryDict
@@ -8,7 +8,7 @@ fileFormat  ASCII;
 /*---------------------------------------------------------------------------*/
 motionModel rotatingAxis;              // motion model can be rotatingAxis or stationary or vibrating
 
-rotatingAxisInfo                       // information for rotatingAxisMotion motion model 
+rotatingAxisInfo                       // information for rotatingAxis motion model 
 {
 	rotAxis 
 	{
diff --git a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/settingsDict b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/settingsDict
index 873b4f3c..595daae5 100644
--- a/tutorials/sphereGranFlow/binarySystemOfParticles/settings/settingsDict
+++ b/tutorials/sphereGranFlow/binarySystemOfParticles/settings/settingsDict
@@ -20,10 +20,6 @@ timePrecision   6;			                     // maximum number of digits for time f
 
 g 				(0 -9.8 0);                      // gravity vector (m/s2) 
 
-/*
-	Simulation domain every particles that goes outside this domain is deleted
-*/
-
 // save necessary (i.e., required) data on disk
 includeObjects (diameter);                                                 
 // exclude unnecessary data from saving on disk