Which file can be used to display the “grid” for this case in paraview after the calculation is complete?

Hi developers,how to display the “mesh” of mfix case in paraview? I dont know that I should use which file in the case folder.
Thanks a lot!

for fluid mesh, you can choose to output vtu file.
for boundary there should be a stl file you can use in paraview.

I get it, thank you very much!