[myrtw_zeneli]

Hello everyone,
I'm quite new at DDPM modelling so I have a fundamental question, because I'm quite confused. In the UDF DEFINE_DPM_DRAG what value does the Fluent read? A drag coefficient Cd, which is then incorporated by the program to the force Fd=18μCdRe/(ρpDp^2 24), or the (18 Cd Re/24). Then in the second case what force does the program induce to the particles???

Thank you very much!