Hi

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

I think in steady case Fluent calculates TKE based on the sum of squares of the average velocities in the domain.

[pkleb]

Hi,

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'...)

Thanks