Re: Drag Force (Coefficient)
Hi Alina,rnrnhaving a look at the relaxation time and viscosity one can see that the system gets unstable if the relaxation time tau gets close to 0.5. You can have a look how tau is computed in the LBconverter:rntau = (U_lattice * char_nu) / (L_lattice * U_char)rnSo your suggestion is correct to keep the value of tau constant.rnrnBestrnRobin