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TKE for steady simulation

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Old   March 13, 2009, 17:03
Default TKE for steady simulation
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When running a steady simulation , how FLUENT computes the TKE ? as it needs the values of the velocities fluctuations ; Does this TKE from Fluent is trustable ?. Is there a way to get the velocities fluctuations and to compute myself the TKE (and compare with values from FLUENT) .

Thanks for any help
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Old   March 14, 2009, 05:21
Default Re: TKE for steady simulation
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I think in steady case Fluent calculates TKE based on the sum of squares of the average velocities in the domain.
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Old   March 16, 2009, 04:53
Default TKE in Steady simulation
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the turbulence kinetic energy is characterised by measured RMS velocity fluctuations(u') as :
TKE = 0.5 ( <u>2 + <v>2 + <w>2 )

What you wrote is that in steady simulation FLUENT is using the mean velocity instead of the velocity fluctuations (u'...)

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