LES: Boundary conditions
anyone have any ideas how to set rough walls in fluent (when using LES) as the wall roughness length parameter is unavailable when using the LES turbulence model option. Setting the wall shear stress does not appear to be a solution as it seems to have the same effect as setting a moving wall. Is it necessary to obtain a UDF to modify the log law coeff, any information would be gratefully received.
Anyone familiar with the above matter??
Thanks in advance.
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