diff --git a/apps/gpu/LBM/MusselOyster/MusselOyster.cpp b/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
index bc4f76dd0528231a57caf05bb7711f0a7e51213a..a913fe1bef1b0f96b2ee77aaf64879e53a27e9dd 100644
--- a/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
+++ b/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
@@ -189,8 +189,8 @@ void multipleLevel(const std::string& configPath)
 
     if (useStreams)
         para->setUseStreams();
-    para->setMainKernel("CumulantK17CompChim");
-    //para->setMainKernel("CumulantK17CompChimStream");
+    // para->setMainKernel("CumulantK17CompChim");
+    para->setMainKernel("CumulantK17CompChimStream");
     *logging::out << logging::Logger::INFO_HIGH << "Kernel: " << para->getMainKernel() << "\n";
 
     // if (para->getNumprocs() > 1) {
@@ -205,33 +205,34 @@ void multipleLevel(const std::string& configPath)
 
 
     if (useGridGenerator) {
-        const real bbzm = 0.0;
+        real bbzm;
         real bbzp;
         if (bivalveType == "MUSSEL")
-            bbzp = 18.3;
+            bbzp = 9.0;
         if (bivalveType == "OYSTER")
-            bbzp = 26.0;
+            bbzp = 13.0;
+        bbzm = -bbzp;
         // bounding box mussel:
         // const real bbxm = 0.0;
         // const real bbxp = 76.0;
         // const real bbym = 0.0;
         // const real bbyp = 35.0;
-        // const real bbzm = 0.0;
-        // const real bbzp = 18.3;
+        // const real bbzm = -9.15;
+        // const real bbzp = 9.15;
         // bounding box oyster:
         // const real bbxm = 0.0;
         // const real bbxp = 102.0;
         // const real bbym = 0.0;
         // const real bbyp = 72.0;
-        // const real bbzm = 0.0;
-        // const real bbzp = 26.0;
+        // const real bbzm = -13.0;
+        // const real bbzp = 13.0;
 
         const real xGridMin  = -100.0;     // -100.0;
-        const real xGridMax  = 600.0;      // 540.0
+        const real xGridMax  = 440.0;      // alt 540.0 // neu 440
         const real yGridMin  = 1.0;        // 1.0;
-        const real yGridMax  = 500.0;      // 440.0;
-        const real zGridMin  = -70;        // -70;
-        const real zGridMax  = 100.0;      // 100;
+        const real yGridMax  = 350.0;      // alt 440.0; // neu 350
+        const real zGridMin  = -85;        // -85;
+        const real zGridMax  = 85.0;       // 85;
 
         TriangularMesh *bivalveSTL       = TriangularMesh::make(stlPath + bivalveType + ".stl");
         TriangularMesh *bivalveRef_1_STL = nullptr;
@@ -246,7 +247,7 @@ void multipleLevel(const std::string& configPath)
             gridBuilder->setNumberOfLayers(10, 8);
 
             if (comm->getNummberOfProcess() == 2) {
-                const real zSplit = round(((double)bbzp + bbzm) * 0.5);          
+                const real zSplit = 0.0; //round(((double)bbzp + bbzm) * 0.5);          
 
                 if (generatePart == 0) {
                     gridBuilder->addCoarseGrid( xGridMin,   yGridMin,     zGridMin, 
@@ -301,8 +302,8 @@ void multipleLevel(const std::string& configPath)
                 //////////////////////////////////////////////////////////////////////////           
             } else if (comm->getNummberOfProcess() == 4) {
 
-                const real xSplit = 85.0;
-                const real zSplit = round(((double)bbzp + bbzm) * 0.5);
+                const real xSplit = 100.0;
+                const real zSplit = 0.0;
 
                 if (generatePart == 0) {
                     gridBuilder->addCoarseGrid(xGridMin, yGridMin, zGridMin, xSplit + overlap, yGridMax,
@@ -390,9 +391,9 @@ void multipleLevel(const std::string& configPath)
                 }
                 //////////////////////////////////////////////////////////////////////////
             } else if (comm->getNummberOfProcess() == 8) {
-                real xSplit = 85;
-                real ySplit = 30;
-                real zSplit = round(((double)bbzp + bbzm) * 0.5);
+                real xSplit = 100.0; // 100.0
+                real ySplit = 32.0;  // 32.0
+                real zSplit = 0.0;
 
                 if (generatePart == 0) {
                     gridBuilder->addCoarseGrid(xGridMin, yGridMin, zGridMin, xSplit + overlap, ySplit + overlap,
diff --git a/apps/gpu/LBM/MusselOyster/configPhoenix8GPU_1LevStrongStream.txt b/apps/gpu/LBM/MusselOyster/configPhoenix8GPU.txt
similarity index 97%
rename from apps/gpu/LBM/MusselOyster/configPhoenix8GPU_1LevStrongStream.txt
rename to apps/gpu/LBM/MusselOyster/configPhoenix8GPU.txt
index 00f253e69cf2983268f84923f04775c3e533a013..87d7515b8c9c1871e1cff86a849d02f08b50fcdc 100644
--- a/apps/gpu/LBM/MusselOyster/configPhoenix8GPU_1LevStrongStream.txt
+++ b/apps/gpu/LBM/MusselOyster/configPhoenix8GPU.txt
@@ -31,8 +31,8 @@ GridPath=/work/y0078217/Grids/GridMusselOyster/Mussel8GPU/
 ##################################################
 #simulation parameter
 ##################################################
-TimeEnd=800000
-TimeOut=400000
+TimeEnd=100#800000
+TimeOut=100#400000
 #TimeStartOut=0
 
 ##################################################
diff --git a/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp b/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
index b503a1601e3176ca9c2b0760bcf98c4985ebcb47..afce3b0688aefe5ce2a6f571f38a2d896287beb3 100644
--- a/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
+++ b/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
@@ -383,6 +383,7 @@ void Simulation::init(SPtr<Parameter> para, SPtr<GridProvider> gridProvider, std
 
    //////////////////////////////////////////////////////////////////////////
    output << "used Device Memory: " << cudaManager->getMemsizeGPU() / 1000000.0 << " MB\n";
+   std::cout << "Process " << comm->getPID() <<": used device memory" << cudaManager->getMemsizeGPU() / 1000000.0 << " MB\n" << std::endl;
    //////////////////////////////////////////////////////////////////////////
 
    //InterfaceDebugWriter::writeInterfaceLinesDebugCF(para.get());