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-   -   Roughness and Turbulent multiplier (http://www.cfd-online.com/Forums/cfx/18524-roughness-turbulent-multiplier.html)

Sumon May 16, 2001 22:36

Roughness and Turbulent multiplier
 
Hi everyone

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.

Thanks

Sumon


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