output particle forces from CFD-DEM

[TermeHansen]

I have been playing a bit around with this tool, and seems very nice.

I like that we we automatically output data in vtu format for easy postprocessing in paraview and/or pyvista/python. For my current work I am looking into using CFD-DEM for simulating cells in a bio-reactor. For this I need to be able to follow the forces acting on the particles, but I can not see how I can get this output of forces I have activated in the CFD-DEM section (specifically the drag force).

Is it something I have overlooked?

[blaisb]

Dear @TermeHansen, the entire forces and torques that result from particle-fluid interaction are stored in the fem_torque and fem_force. The issue is that this does not separate the different component of the force (e..g drag, lift, etc.). The entire interaction is lumped together. If you wanted to separate those at the moment of output, some additional post-processing would need to be done :)