TKE for steady simulation
 

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

Re: TKE for steady simulation
 

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

TKE in Steady simulation
 

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