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UDF for k-Epslon constants

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Old   April 9, 2008, 08:53
Default UDF for k-Epslon constants
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Kostetezer
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I would like to change the standard k-Epslon constants to an UDF functionn and I did not find this UDF in the Manual. I want to use the LAM-Bremhorst model, a modified k-Epslon.

In this model

Cmu = 0.09 * FMU

C1 = 1.44 * F1

C2 = 1.92 * F2

where

FMU = [ 1.-EXP(-0.0165*REYN) ]**2 (1.+20.5/REYT)

F1 = 1.+(0.05/FMU)**3

F2 = 1.-EXP(-REYT**2)

and

REYN = SQRT(KE)*YN/ENUL

REYT = KE**2/EP/ENUL

Regards

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