2D/3D coupling DEM-LBM

good evening everyone

I’d like to know if there are people who work on the 2D/3D coupling DEM-LBM. I am trying to develop a c + + code for modeling fluid interaction particles immersed in granular materials. Do not use a result of open-source code. I am facing no difficulties I’m looking for solutions.

Best regards!

hello, yoan,I do it
but i have the problem of paticle visul