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Reply To: Modify taueff

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› Forums › OpenLB › General Topics › Modify taueff › Reply To: Modify taueff

September 27, 2024 at 4:42 pm #9300
FBukreev
Keymaster

Hi,

for the VanDriest damping you need to calculate wall shear rate und tangential velocity derivative in the normal direction also in the the next layer. It is actually only possible if you change the source code of the wall function setter. So that it does not change the LBM populations but only adjusts the viscosity. Practically you can copy wall function code and delete there setting of the populations. Also in the setter of the wall function you can say that a new postprocessor is added to the second layer from wall and not in the first one. In that case you do not need addition material number.