Thank you Jeff.
I have a problem with the simulation (Maybe I should open another thread).
I tried to simulate a 2D case of flow around the cylinder, but I get this error, although I have given the particle size, density, and mass flow rate on the inlet, I get this error at the beginning of the simulation:
Error 1100: FATAL - DEM particle input file not found!
Error 1100: Unable to determine the phase of one or more particles.
ID Diameter Density
1 0.0000 0.0000
Defined phase parameters (keywords or initial density):
ID Diameter Density
1 0.31000E-03 1030.0
Thank you.