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Re: Drag Force (Coefficient)

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› Forums › OpenLB › General Topics › Drag Force (Coefficient) › Re: Drag Force (Coefficient)

September 8, 2016 at 3:21 pm #2451
robin.trunk
Participant

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