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Wall bounday condition, Comsol 5.2a
Posted 11.08.2017, 11:11 GMT-4 Computational Fluid Dynamics (CFD) Version 5.2a 0 Replies
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in the documentation for the wall boundary condition, I read:
Wall Functions
The Wall functions boundary condition replaces the no-slip condition on solid walls for certain turbulence models such as the k-ε and k-ω models. Wall functions are used to model the thin region with large gradients in flow variables near the wall.
When Apply wall roughness is selected, a Sand roughness model, derived from the experiments by Nikuradse, is applied. More general roughness types can be specified by selecting Generic roughness.
Can someone help me to find where is the check "Apply wall roughness" that enables the wall roughness?
thanks
Hello Daniele
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