Dear developers, let me ask you a question. Thank you
Yes, you can define each type of particle in a different solids phase.
Thank you very much for your reply. I understand your mean.
Also, I wanted to make sure that if the solution is water, that I just select water(L) in the Fluid panel of MFiX.
It seems not a complex problem. You can refer to the tutorials supplied by the MFiX-DEM.
I understand, thanks!