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-   -   Wall Roughness (http://www.cfd-online.com/Forums/fluent/29323-wall-roughness.html)

Rex February 5, 2002 11:54

Wall Roughness
 
In Fluent, the default roughness height is zero, which corresponds to smooth walls. When calculating friction factors, what should be used: The Blasius equation for hydrodynamically smooth walls, or the moody diagram for drawn tubing? Or what else?


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