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Forces on corrugated wall

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Old   November 1, 2010, 18:16
Default Forces on corrugated wall
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Dear foamers,
I have created a simple wedged geometry for a corrugated pipe, and would like to compute a friction factor. I have tried to use the wallShearStress for this, as given in http://www.cfd-online.com/Wiki/Skin_...on_coefficient, but the value I get is far lower than it should be. Are there better ways to compute this friction coeffecient that I should look into?
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