Roughness and Turbulent multiplier
There is a problem about turbulent multiplier in USRWTM. In USRWTM user must set TMULT. I want to know how will I set this? In the solver manual(CFX 4.2) ROUGHNESS is set 1.0 (as a default) under the subcommand WALL BOUNDARIES. Could anyone tell me about this? Actually if it is the roughness factor, then its ok, but if it is the roughness height, I want to know the its unit.
Any suggestion about this will be appreciated.
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