diff --git a/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.cpp b/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.cpp
new file mode 100644
index 00000000..2315e43e
--- /dev/null
+++ b/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.cpp
@@ -0,0 +1,75 @@
+/*------------------------------- 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 "conveyorBeltMotion.hpp"
+
+
+pFlow::conveyorBeltMotion::conveyorBeltMotion
+(
+	const objectFile &objf, 
+	repository *owner
+)
+:
+	fileDictionary(objf, owner)
+{
+
+	if(!impl_readDictionary(*this) )
+	{
+		fatalErrorInFunction;
+		fatalExit;
+	}
+}
+
+pFlow::conveyorBeltMotion::conveyorBeltMotion
+(
+	const objectFile &objf, 
+	const dictionary &dict, 
+	repository *owner
+)
+:
+	fileDictionary(objf, dict, owner)
+{
+	if(!impl_readDictionary(*this) )
+	{
+		fatalErrorInFunction;
+		fatalExit;
+	}
+}
+
+bool pFlow::conveyorBeltMotion::write
+(
+	iOstream &os, 
+	const IOPattern &iop
+) const
+{
+	// a global dictionary
+	dictionary newDict(fileDictionary::dictionary::name(), true);
+	if( iop.thisProcWriteData() )
+	{
+		if( !this->impl_writeDictionary(newDict) || 
+			!newDict.write(os))
+		{
+			fatalErrorInFunction<<
+			" error in writing to dictionary "<< newDict.globalName()<<endl;
+			return false;
+		}
+	}
+    return true;
+}
diff --git a/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.hpp b/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.hpp
new file mode 100644
index 00000000..98371d39
--- /dev/null
+++ b/src/MotionModel/conveyorBeltMotion/conveyorBeltMotion.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 __conveyorBeltMotion_hpp__
+#define __conveyorBeltMotion_hpp__
+
+
+#include "MotionModel.hpp"
+#include "conveyorBelt.hpp"
+#include "fileDictionary.hpp"
+
+namespace pFlow
+{
+
+
+/**
+ * conveyor belt model for walls
+ * 
+ * This class is used for simulaiton that wall components are conveyor belt.
+ * 
+\verbatim
+
+// In geometryDict file, this will defines stationary walls
+...
+motionModel conveyorBelt;
+
+// this dictionary is optional
+conveyorBeltInfo
+{
+  conveyorBelt1
+  {
+    // the definition based on class conveyorBelt1
+  }
+}
+...
+\endverbatim
+ *
+ */
+class conveyorBeltMotion
+:
+    public fileDictionary,
+    public MotionModel<conveyorBeltMotion, conveyorBelt>
+{
+protected:
+
+	friend MotionModel<conveyorBeltMotion, conveyorBelt>;
+  
+	bool impl_isMoving()const
+	{
+		return false;
+	}
+
+	bool impl_move(uint32, real, real)const
+	{
+		return true;
+	}
+	
+	void impl_setTime(uint32 ,real ,real )const
+	{}
+
+public:
+
+	TypeInfo("conveyorBeltMotion");
+
+	conveyorBeltMotion(const objectFile& objf, repository* owner);
+
+	conveyorBeltMotion(
+		const objectFile& objf, 
+		const dictionary& dict, 
+		repository* owner);
+
+
+    using fileDictionary::write;
+
+	bool write(iOstream& os, const IOPattern& iop)const override;
+
+	static
+    auto noneComponent()
+    {
+      return conveyorBelt();
+    }
+};
+
+} // pFlow
+
+
+#endif // __conveyorBeltMotion_hpp__
\ No newline at end of file
diff --git a/src/MotionModel/entities/conveyorBelt/conveyorBelt.cpp b/src/MotionModel/entities/conveyorBelt/conveyorBelt.cpp
new file mode 100644
index 00000000..a92466c9
--- /dev/null
+++ b/src/MotionModel/entities/conveyorBelt/conveyorBelt.cpp
@@ -0,0 +1,72 @@
+/*------------------------------- 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 "conveyorBelt.hpp"
+#include "dictionary.hpp"
+
+
+FUNCTION_H
+pFlow::conveyorBelt::conveyorBelt(const dictionary& dict)
+{
+  if(!read(dict))
+	{
+		fatalErrorInFunction<<
+		"  error in reading conveyorBelt from dictionary "<< dict.globalName()<<endl;
+		fatalExit;
+	}
+}
+
+
+
+FUNCTION_H
+bool pFlow::conveyorBelt::read(const dictionary& dict)
+{	
+
+	velocity_ 		= dict.getVal<realx3>("velocity");
+	
+	return true;
+}
+
+FUNCTION_H
+bool pFlow::conveyorBelt::write(dictionary& dict) const
+{
+	if( !dict.add("velocity", velocity_) )
+	{
+		fatalErrorInFunction<<
+		"  error in writing velocity to dictionary "<< dict.globalName()<<endl;
+		return false;
+	}
+	return true;
+}
+
+FUNCTION_H
+bool pFlow::conveyorBelt::read(iIstream& is)
+{
+	
+	notImplementedFunction;
+	return true;
+}
+
+FUNCTION_H
+bool pFlow::conveyorBelt::write(iOstream& os)const
+{
+  os.writeWordEntry("velocity", velocity_);
+  return true;
+}
\ No newline at end of file
diff --git a/src/MotionModel/entities/conveyorBelt/conveyorBelt.hpp b/src/MotionModel/entities/conveyorBelt/conveyorBelt.hpp
new file mode 100644
index 00000000..a3d30c0c
--- /dev/null
+++ b/src/MotionModel/entities/conveyorBelt/conveyorBelt.hpp
@@ -0,0 +1,108 @@
+/*------------------------------- 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 __conveyorBelt_hpp__
+#define __conveyorBelt_hpp__
+
+
+#include "types.hpp"
+#include "typeInfo.hpp"
+#include "streams.hpp"
+
+namespace pFlow
+{
+
+// forward
+class dictionary;
+
+
+/**
+ * conveyor belt model for a wall
+ * 
+ */
+class conveyorBelt
+{
+private:
+
+	realx3  velocity_{0, 0, 0};
+
+public:
+
+	TypeInfoNV("conveyorBelt");
+
+	FUNCTION_HD
+	conveyorBelt()=default;
+
+	FUNCTION_H
+	explicit conveyorBelt(const dictionary& dict);
+	
+
+	FUNCTION_HD
+	conveyorBelt(const conveyorBelt&) = default;
+
+	conveyorBelt& operator=(const conveyorBelt&) = default;
+
+	INLINE_FUNCTION_HD
+	void setTime(real t)
+	{}
+
+	INLINE_FUNCTION_HD
+	realx3 linVelocityPoint(const realx3 &)const
+	{
+		return velocity_;
+	}
+
+	INLINE_FUNCTION_HD
+	realx3 transferPoint(const realx3& p, real)const
+	{
+		return p;
+	}
+
+	// - IO operation
+	FUNCTION_H 
+	bool read(const dictionary& dict);
+
+	FUNCTION_H
+	bool write(dictionary& dict) const;
+
+	FUNCTION_H
+	bool read(iIstream& is);
+
+	FUNCTION_H
+	bool write(iOstream& os)const;
+
+};
+
+inline iOstream& operator <<(iOstream& os, const conveyorBelt& obj)
+{
+	
+	return os;
+}
+
+inline iIstream& operator >>(iIstream& is, conveyorBelt& obj)
+{
+	
+	return is;
+}
+
+}
+
+
+#endif
diff --git a/tutorials/sphereGranFlow/conveyorBelt/caseSetup/interaction b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/interaction
new file mode 100755
index 00000000..3ea53adf
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/interaction
@@ -0,0 +1,71 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName interaction;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+materials   (lightMat heavyMat wallMat);         // a list of materials names
+
+densities            (1000 1500.0 2500);         // density of materials [kg/m3]
+
+contactListType       sortedContactList;
+
+contactSearch
+{
+   method         NBS;                           // method for broad search particle-particle
+   
+   updateInterval 10;
+
+   sizeRatio      1.1;
+
+   cellExtent     0.55;
+
+   adjustableBox  No;
+} 
+
+model
+{
+   contactForceModel nonLinearLimited;
+
+   rollingFrictionModel        normal;
+
+   /*
+
+   Property (lightMat-lightMat   lightMat-heavyMat    lightMat-wallMat
+                                 heavyMat-heavyMat    heavyMat-wallMat
+                                                      wallMat-wallMat  );
+   */
+
+   Yeff (1.0e6 1.0e6 1.0e6                       // Young modulus [Pa]
+               1.0e6 1.0e6
+                     1.0e6);
+   
+   Geff (0.8e6 0.8e6 0.8e6                       // Shear modulus [Pa]
+               0.8e6 0.8e6
+                     0.8e6);
+
+   nu    (0.25 0.25  0.25                        // Poisson's ratio [-]
+               0.25  0.25
+                     0.25);
+
+   en (0.97  0.97    0.85                        // coefficient of normal restitution
+             0.97    0.85
+                     1.00);
+
+   et (1.0   1.0  1.0                            // coefficient of tangential restitution 
+             1.0  1.0
+                  1.0);
+
+   mu (0.65   0.65 0.35                          // dynamic friction 
+              0.65 0.35
+                   0.35);
+
+   mur (0.1  0.1 0.1                             // rolling friction 
+             0.1 0.1
+                 0.1);       
+}
+
+
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/caseSetup/particleInsertion b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/particleInsertion
new file mode 100755
index 00000000..195f27df
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/particleInsertion
@@ -0,0 +1,54 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName particleInsertion;
+objectType dicrionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+active           Yes;                            // is insertion active -> yes or no
+
+checkForCollision No;                            // is checked          -> yes or no
+
+/*
+   one layers of particles are packed 
+*/
+
+layer0
+{  
+   timeControl          simulationTime;
+
+   regionType                 cylinder;          // type of insertion region
+
+   rate                          15000;          // insertion rate (particles/s)
+
+   startTime                         0;          // (s)
+
+   endTime                         0.5;          // (s)
+
+   insertionInterval             0.025;          // s 
+
+   cylinderInfo 
+   {
+   	radius 	                   0.09;          // radius of cylinder (m)
+
+   	p1              ( 0.0  0.0 0.1 );          // (m,m,m)
+
+   	p2              ( 0.0  0.0 0.11);          // (m,m,m)
+   }
+   
+   setFields
+   {
+     velocity     realx3 (0.0 0.0 -0.6);         // initial velocity of inserted particles 
+   }
+   
+   mixture
+   {
+      lightSphere                    1;          // mixture composition of inserted particles 
+   }
+}
+
+
+
+
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/caseSetup/shapes b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/shapes
new file mode 100755
index 00000000..603c28cb
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/caseSetup/shapes
@@ -0,0 +1,15 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */ 
+objectName 	sphereDict;
+objectType 	sphereShape;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+names 		 (lightSphere heavySphere); 	     // names of shapes 
+
+diameters 	             (0.007 0.007);		     // diameter of shapes 
+
+materials	       (lightMat heavyMat);		     // material names for shapes 
+
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/cleanThisCase b/tutorials/sphereGranFlow/conveyorBelt/cleanThisCase
new file mode 100755
index 00000000..8a0ab919
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/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 
+
+#------------------------------------------------------------------------------
diff --git a/tutorials/sphereGranFlow/conveyorBelt/runThisCase b/tutorials/sphereGranFlow/conveyorBelt/runThisCase
new file mode 100755
index 00000000..c48d71fe
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/runThisCase
@@ -0,0 +1,21 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+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
+
+
+
+
+#------------------------------------------------------------------------------
diff --git a/tutorials/sphereGranFlow/conveyorBelt/settings/domainDict b/tutorials/sphereGranFlow/conveyorBelt/settings/domainDict
new file mode 100755
index 00000000..ef8b80a9
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/settings/domainDict
@@ -0,0 +1,65 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName 	domainDict;
+objectType 	dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+globalBox                                        // Simulation domain: every particles that goes outside this domain will be deleted
+{
+	min (-0.11 -0.11 -0.41);
+	
+	max ( 0.11  0.11  0.41);
+}
+
+boundaries
+{
+	// Determines how often (how many iterations) do you want to 
+
+	// rebuild the list of particles in the neighbor list 
+
+	// of all boundaries in the simulation domain 
+
+	neighborListUpdateInterval 30;
+	
+	// Determines 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 
+
+	neighborLength          0.004;
+
+	left
+	{
+		type exit;	                             // other options: periodict, reflective 
+	}
+
+	right
+	{
+		type exit;                               // other options: periodict, reflective 
+	}
+
+	bottom
+	{
+		type exit;                               // other options: periodict, reflective 
+	}
+
+	top
+	{
+		type exit;                               // other options: periodict, reflective 
+	}
+
+	rear
+	{
+		type exit;                               // other options: periodict, reflective 
+	}
+
+	front
+	{
+		type exit;                               // other options: periodict, reflective 
+	}
+}    
+
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/settings/geometryDict b/tutorials/sphereGranFlow/conveyorBelt/settings/geometryDict
new file mode 100755
index 00000000..8f9a76b1
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/settings/geometryDict
@@ -0,0 +1,78 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName 	geometryDict;
+objectType 	dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+motionModel            stationary;               // motion model can be rotatingAxis or stationary or vibrating
+stationaryInfo
+{
+	
+}
+/*conveyorBeltInfo
+{
+    conveyorBelt1
+    {
+        velocity (1, 0, 0);
+    }
+}*/
+
+surfaces
+{
+	cylinderShell
+	{
+		type 		 cylinderWall;  	         // other options: cuboidWall and planeWall
+
+		p1 			(0.0 0.0 0.0);               // begin point of cylinder axis
+
+		p2 			(0.0 0.0 0.4);               // end point of cylinder axis
+
+		radius1 	          0.1;		         // radius at p1
+ 
+		radius2 	          0.1;		         // radius at p2
+
+		resolution 	           36;      	     // number of divisions
+
+		material 	      wallMat;   	         // material name of this wall
+	}
+
+	coneShell
+	{
+		type 		 cylinderWall;  	         // other options: cuboidWall and planeWall
+
+		p1 		   (0.0 0.0 -0.1);               // begin point of cylinder axis
+
+		p2 			(0.0 0.0 0.0);               // end point of cylinder axis
+
+		radius1 	         0.02;		         // radius at p1
+
+		radius2 	          0.1;		         // radius at p2
+  
+		resolution 	           36;      	     // number of divisions
+
+		material 	      wallMat;   	         // material name of this wall
+	}
+
+	belt
+	{
+		type 	 stlWall;  	// type of the wall
+		file 	 belt.stl;	// file name in stl folder		
+		material wallMat;   // material name of this wall
+		//motion 	 conveyorBelt1;		// motion component name 
+	}
+
+	box
+	{
+		type 	 stlWall;  	// type of the wall
+		file 	 box.stl;	// file name in stl folder		
+		material wallMat;   // material name of this wall
+	}
+}
+
+
+
+
+
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/settings/particlesDict b/tutorials/sphereGranFlow/conveyorBelt/settings/particlesDict
new file mode 100755
index 00000000..4df47975
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/settings/particlesDict
@@ -0,0 +1,47 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName 	particlesDict;
+objectType 	dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+setFields
+{
+	/*
+	    Default value for fields defined for particles
+
+		These fields should always be defined for simulations with 
+
+		spherical particles.
+	*/
+
+	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	lightSphere; 	 // name of the particle shape 
+	}
+
+	selectors
+	{}
+}
+
+positionParticles                                // positions particles 
+{
+	method                empty;                 // other options: ordered and random 
+
+	regionType              box;                 // other options: cylinder and sphere  
+
+	boxInfo                                      // box region for positioning particles 
+	{
+		min (-0.08 -0.08 0.015);                 // lower corner point of the box 
+
+		max ( 0.08  0.08 0.098);	             // upper corner point of the box 
+	} 
+}
+
diff --git a/tutorials/sphereGranFlow/conveyorBelt/settings/settingsDict b/tutorials/sphereGranFlow/conveyorBelt/settings/settingsDict
new file mode 100755
index 00000000..c5b6650d
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/settings/settingsDict
@@ -0,0 +1,42 @@
+/* -------------------------------*- C++ -*--------------------------------- *\ 
+|  phasicFlow File                                                            | 
+|  copyright: www.cemf.ir                                                     | 
+\* ------------------------------------------------------------------------- */  
+objectName 	settingsDict;
+objectType 	dictionary;
+fileFormat  ASCII;
+/*---------------------------------------------------------------------------*/
+run   layerdSiloFilling;
+
+dt 				0.00005; 	                     // time step for integration (s)
+
+startTime 		    0.0; 		                 // start time for simulation 
+
+endTime 		    5.0;	                     // end time for simulation 
+
+saveInterval 	   0.05; 		                 // time interval for saving the simulation
+
+timePrecision         6;	                     // maximum number of digits for time folder 
+
+g 			 (0 0 -9.8);                         // gravity vector (m/s2) 
+
+// save data objects that are not automatically saved on disk.
+
+// overrides the default behavior 
+
+includeObjects (diameter);    
+
+// exclude unnecessary data from saving on disk
+
+excludeObjects (rVelocity.dy1 pStructPosition.dy1 pStructVelocity.dy1); 
+
+integrationMethod 		AdamsBashforth2; 	      // integration method 
+
+writeFormat				          ascii;          // data writting format (ascii or binary)
+
+timersReport 			            Yes;  	      // report timers
+
+timersReportInterval   	           0.01;	      // time interval for reporting timers
+
+
+
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new file mode 100644
index 00000000..6ab0e13b
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/stl/belt.stl
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diff --git a/tutorials/sphereGranFlow/conveyorBelt/stl/box.stl b/tutorials/sphereGranFlow/conveyorBelt/stl/box.stl
new file mode 100644
index 00000000..3b0bb013
--- /dev/null
+++ b/tutorials/sphereGranFlow/conveyorBelt/stl/box.stl
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