diff --git a/apps/gpu/LBM/BoundaryLayer/BoundaryLayer.cpp b/apps/gpu/LBM/BoundaryLayer/BoundaryLayer.cpp
index 51b890d205c52650343c9aa2608f9bc3e237da56..7d2d79d8c21f1966a5b2369f2649df2efc3b4bcb 100644
--- a/apps/gpu/LBM/BoundaryLayer/BoundaryLayer.cpp
+++ b/apps/gpu/LBM/BoundaryLayer/BoundaryLayer.cpp
@@ -238,11 +238,11 @@ void multipleLevel(const std::string& configPath)
     if(isFirstSubDomain || isMidSubDomain)
     {
         xGridMax += overlap;
-        xGridMin -= overlap;
+        // xGridMin -= overlap;
     }
     if(isLastSubDomain || isMidSubDomain)
     {
-        xGridMax += overlap;
+        // xGridMax += overlap;
         xGridMin -= overlap;
     }
 
@@ -252,8 +252,8 @@ void multipleLevel(const std::string& configPath)
     {
         gridBuilder->setNumberOfLayers(4,0);
         real xMaxRefinement = readPrecursor? xGridMax-H: xGridMax;   //Stop refinement some distance before outlet if domain ist not periodic
-        gridBuilder->addGrid( new Cuboid( xGridMin+dx, 0.f, 0.f, xMaxRefinement, L_y,  0.5*L_z) , 1 );
-
+        // gridBuilder->addGrid( new Cuboid( xGridMin+dx, 0.f, 0.f, xMaxRefinement, L_y,  0.5*L_z) , 1 );
+        gridBuilder->addGrid( new Cuboid( 0.f, 0.f, 0.f, 5000.0, L_y,  0.5*L_z) , 1 );
         para->setMaxLevel(2);
         scalingFactory.setScalingFactory(GridScalingFactory::GridScaling::ScaleCompressible);
     }
@@ -302,8 +302,9 @@ void multipleLevel(const std::string& configPath)
     {
         if(isFirstSubDomain || nProcs == 1)
         {   
-            auto precursor = createFileCollection(precursorDirectory + "/precursor", FileType::VTK);
-            gridBuilder->setPrecursorBoundaryCondition(SideType::MX, precursor, nTReadPrecursor);
+            // auto precursor = createFileCollection(precursorDirectory + "/precursor", FileType::VTK);
+            // gridBuilder->setPrecursorBoundaryCondition(SideType::MX, precursor, nTReadPrecursor);
+            gridBuilder->setVelocityBoundaryCondition(SideType::MX, velocityLB, 0.0, 0.0);
         }
 
         if(isLastSubDomain || nProcs == 1)
diff --git a/src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp b/src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp
index df53a0d9300ead34ad96b5257b1c8b5debad3a70..d1568932d9802d1060e37d26ed37fa48de1abb05 100644
--- a/src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp
+++ b/src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp
@@ -861,6 +861,10 @@ real Parameter::getScaledForceRatio(int level)
 {
     return this->getForceRatio()*(level+1);
 }
+real Parameter::getScaledStressRatio(int level)
+{
+    return this->getVelocityRatio()*this->getVelocityRatio();
+}
 void Parameter::setRealX(real RealX)
 {
     ic.RealX = RealX;
diff --git a/src/gpu/VirtualFluids_GPU/Parameter/Parameter.h b/src/gpu/VirtualFluids_GPU/Parameter/Parameter.h
index cf71b20bb22f35948f567b5501c066f1732efdbf..de5e2b0a4d983efdd272649962bfc9cfa60c7f19 100644
--- a/src/gpu/VirtualFluids_GPU/Parameter/Parameter.h
+++ b/src/gpu/VirtualFluids_GPU/Parameter/Parameter.h
@@ -778,6 +778,8 @@ public:
     real getScaledDensityRatio(int level);
     //! \returns the pressure ratio in SI/LB units scaled to the respective level
     real getScaledPressureRatio(int level);
+    //! \returns the stress ratio in SI/LB units scaled to the respective level
+    real getScaledStressRatio(int level)
     //! \returns the time ratio in SI/LB units scaled to the respective level
     real getScaledTimeRatio(int level);
     //! \returns the length ratio in SI/LB units scaled to the respective level
diff --git a/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu b/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
index 3bde6e8d80d947b2870935c967a00385f6ecfb24..44f76220f77db01d63a153cccec40bad7cca5449 100644
--- a/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
+++ b/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
@@ -187,7 +187,7 @@ void Probe::init(Parameter* para, GridProvider* gridProvider, CudaMemoryManager*
     this->velocityRatio      = std::bind(&Parameter::getScaledVelocityRatio,        para, _1); 
     this->densityRatio       = std::bind(&Parameter::getScaledDensityRatio,         para, _1);
     this->forceRatio         = std::bind(&Parameter::getScaledForceRatio,           para, _1);
-    this->stressRatio        = std::bind(&Parameter::getScaledPressureRatio,        para, _1);
+    this->stressRatio        = std::bind(&Parameter::getScaledStressRatio,          para, _1);
     this->viscosityRatio     = std::bind(&Parameter::getScaledViscosityRatio,       para, _1);
     this->nondimensional     = std::bind(&Probe::getNondimensionalConversionFactor, this, _1);