# turbulence kinetic energy?

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 December 3, 2000, 00:06 turbulence kinetic energy? #1 Eric Guest   Posts: n/a What is the formula to define the turbulence kinetic energy and turbulence dissipation rate? I am using the k-epsilon and VOF model? Thanks for any suggestion.

 December 3, 2000, 11:41 Re: turbulence kinetic energy? #2 Maurizio Barbato Guest   Posts: n/a Hi, a good guess is: k = 1.5 * (U * TI)^2 [m^2/s^2] eps = Cmu^0.75 * (k^1.5 / (0.07 * L)) [m^2/s^3] where U is the average (reference) velocity [m/s] TI is the turbulent intensity which depends on the case (e.g. = 0.10 means turbulence that velocity turbulent fluctuations have an aplitude which is 10% of the average velocity) Cmu = 0.09 is a constant L is a characteristic dimension which depends on the case (e.g. tube diameter) [m] I hope this helps. Cheers Maurizio

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