Hi,
have a look at http://developer.download.nvidia.com/presentations/2010/gdc/Direct3D_Effects.pdf or Screen Space Fluids Paper.
I already implemented this using OpenCL and DirectX with C++, I will port this to jME3, as part of my OpenCL-library (see OpenCL for jME3 ).
This is how it looks in my implementation (reflections are still missing):
