[socreate]

Hi,

Regarding to DDPM, I am very puzzled about the relationship between Fd in the particle motion equation (Fd(Ul-Us)) and Ksl in fluid equation (Ksl(Us-Ul)). I could not find any related documents. I think Fd also consider the effect of porosity but not sure.

Could you give me some suggestions. Thank you very much.

Best wishes,
socreate