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Reply To: Setting both Density and Velocity at Boundary

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April 2, 2020 at 2:23 pm #4898
mathias
Keymaster

Hi Julius,

in LBM, desity is like pressure. If you fix it on both side and fix the velocity on one side, the simulation the be unstable.

I would do it (I have done it that way actually) in the following way: Fix the desity at all inlets and set a pressure condition at the outlet OR fix velociyt + desity (by iniEquilibrium) at one side and use a convection BC at the other side.

Best
Mathias