Add GPU apps to Phoenix config

CMake/cmake_config_files/PHOENIX.config.cmake

@@ -24,4 +24,11 @@ IF(${USE_DEM_COUPLING})
 ENDIF()
 
 ## nvidia
-set(CMAKE_CUDA_ARCHITECTURES 60) # NVIDIA Tesla P100
\ No newline at end of file
+set(CMAKE_CUDA_ARCHITECTURES 60) # NVIDIA Tesla P100
+
+set(GPU_APP "apps/gpu/LBM/")
+list(APPEND USER_APPS 
+    # "${GPU_APP}DrivenCavityMultiGPU"
+    "${GPU_APP}SphereScaling"
+    # "${GPU_APP}MusselOyster"
+    )