diff --git a/apps/gpu/LBM/DrivenCavity/DrivenCavity.cpp b/apps/gpu/LBM/DrivenCavity/DrivenCavity.cpp
index 869989462593edf14b198efa598f95c1b7051ba9..9f31c9358620331dd45dd1ff1a32f29b677a6d13 100644
--- a/apps/gpu/LBM/DrivenCavity/DrivenCavity.cpp
+++ b/apps/gpu/LBM/DrivenCavity/DrivenCavity.cpp
@@ -95,7 +95,7 @@ const real dt = (real)1.0e-3; //0.5e-3;
 
 const uint nx = 64;
 
-std::string path(".");
+std::string path("D:/out/DrivenCavity/new");
 
 std::string simulationName("DrivenCavityChim");
 
@@ -123,8 +123,18 @@ void multipleLevel(const std::string& configPath)
 
 	real dx = L / real(nx);
 
-	gridBuilder->addCoarseGrid(-0.5 * L, -0.5 * L, -0.5 * L,
-								0.5 * L,  0.5 * L,  0.5 * L, dx);
+	//gridBuilder->addCoarseGrid(-0.5 * L, -0.5 * L, -0.5 * L,
+	//							0.5 * L,  0.5 * L,  0.5 * L, dx);
+
+	gridBuilder->addCoarseGrid(-2.0 * dx, -0.5 * L, -0.5 * L,
+								2.0 * dx,  0.5 * L,  0.5 * L, dx);
+
+    auto refBox = new Cuboid(-0.1 * L, -0.1 * L, -0.1 * L,
+                              0.1 * L,  0.1 * L,  0.1 * L);
+
+    gridBuilder->addGrid(refBox, 1);
+
+    gridBuilder->setNumberOfLayers(0, 0);
 
 	gridBuilder->setPeriodicBoundaryCondition(false, false, false);
 
@@ -166,13 +176,15 @@ void multipleLevel(const std::string& configPath)
 
 		para->setDevices(std::vector<uint>{(uint)0});
 
+        para->setOutputPath( path );
+
         para->setOutputPrefix( simulationName );
 
         para->setFName(para->getOutputPath() + "/" + para->getOutputPrefix());
 
         para->setPrintFiles(true);
 
-        para->setMaxLevel(1);
+        para->setMaxLevel(2);
 
         para->setVelocity(velocityLB);
         para->setViscosity(viscosityLB);
@@ -202,6 +214,10 @@ void multipleLevel(const std::string& configPath)
 
         ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
+        gridBuilder->writeGridsToVtk(path + "/grid/");
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
         SPtr<CudaMemoryManager> cudaMemoryManager = CudaMemoryManager::make(para);
 
         SPtr<GridProvider> gridGenerator = GridProvider::makeGridGenerator(gridBuilder, para, cudaMemoryManager);
diff --git a/gpu.cmake b/gpu.cmake
index eef54759cfbbd7dff9b6c81d9d79b2f0ef0d09b1..44c3ce9ab3eb8d99ed8ede0ddc58bfe4112b78dd 100644
--- a/gpu.cmake
+++ b/gpu.cmake
@@ -31,12 +31,12 @@ IF (BUILD_VF_GPU)
     #add_subdirectory(targets/apps/LBM/BaselNU)
     #add_subdirectory(targets/apps/LBM/BaselMultiGPU)
 
-    #add_subdirectory(apps/gpu/LBM/DrivenCavity)
+    add_subdirectory(apps/gpu/LBM/DrivenCavity)
     add_subdirectory(apps/gpu/LBM/WTG_RUB)
     #add_subdirectory(apps/gpu/LBM/gridGeneratorTest)
     #add_subdirectory(apps/gpu/LBM/TGV_3D)
     #add_subdirectory(apps/gpu/LBM/TGV_3D_MultiGPU)
-    add_subdirectory(apps/gpu/LBM/ActuatorLine)
+    #add_subdirectory(apps/gpu/LBM/ActuatorLine)
 ELSE()
     MESSAGE( STATUS "exclude Virtual Fluids GPU." )
 ENDIF()