# k-e

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 February 20, 2000, 10:30 k-e #1 K.L.Huang Guest   Posts: n/a Sponsored Links in turbulence case alwayse how do you descide the value of k an e?

 February 21, 2000, 05:46 Re: k-e #2 allan Guest   Posts: n/a On velocity inlets k=1.5*(turbulence intensity * velocity)^2 and in general ep=cmu^.75 * k^1.5 / length scale cmu = 0.09 usually length scale can be 10% of a characteristic dimension

 February 21, 2000, 08:36 Re: k-e #3 K.L.Huang Guest   Posts: n/a thanks,but... how is the turbulence intensity ?

 February 21, 2000, 09:49 Re: k-e #4 allan Guest   Posts: n/a turbulence intensity is defined as the fluctuating velocity component divided by the nominal velocity, typically 10% is a combustor 1%-6% in a wind tunnel. Have a look at the values they use in the tutorials or the user guide

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