diff --git a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/U b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/U
index d809edc4..60194664 100644
--- a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/U
+++ b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/U
@@ -34,7 +34,7 @@ boundaryField
         uniformValue     table
         (
             (0.000 (0 0 0.002))
-            (0.500 (0 0 0.020))
+            (0.100 (0 0 0.020))
         );
     }
 
diff --git a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/p b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/p
index fce46965..34bd8374 100644
--- a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/p
+++ b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/0/p
@@ -16,7 +16,7 @@ FoamFile
 
 dimensions      [0 2 -2 0 0 0 0];
 
-internalField   uniform 0e0;
+internalField   uniform 1;
 
 boundaryField
 {
diff --git a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/constant/couplingProperties b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/constant/couplingProperties
index de31de23..01def497 100644
--- a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/constant/couplingProperties
+++ b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/constant/couplingProperties
@@ -55,12 +55,12 @@ smoothingModel off;// localPSizeDiffSmoothing;// constDiffSmoothing; //
 
 forceModels
 (
-    GidaspowDrag
+    //GidaspowDrag
     //BeetstraDrag
     //DiFeliceDrag
     gradPForce
     viscForce
-    //KochHillDrag
+    KochHillDrag
     //DEMbasedDrag
     //RongDrag
     //Archimedes
diff --git a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/system/controlDict b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/system/controlDict
index f63efff4..05af8ef1 100644
--- a/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/system/controlDict
+++ b/tutorials/cfdemSolverPiso/ErgunTestMPI/CFD/system/controlDict
@@ -23,7 +23,7 @@ startTime       0;
 
 stopAt          endTime;
 
-endTime         0.5;
+endTime         0.1;
 
 deltaT          0.0005;