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-   -   Turbulence model change (http://www.cfd-online.com/Forums/openfoam-solving/59409-turbulence-model-change.html)

msha September 25, 2007 00:57

I'd like to use Q-Zeta turbul
 
I'd like to use Q-Zeta turbulence model instead of k-epsilon.But I don't know how to do this.

Once I simply replaced "k" with "Q" and "Zeta" with "epsilon" in "fvshcemes" and set turbulence model to Q-Zeta in turbulenceproperties dictionary but it did not work.

Generally if someone wants to change turbulence model,what steps are required.

I appreciate any help in steps.

Any suggestions please.

cosimobianchini September 25, 2007 03:50

Hi Mojtaba, first you have to
 
Hi Mojtaba,
first you have to select the chosen turbulence model on the turbulencePropertiesDict in constant/turbulenceProperties file. Remember to also set the right values for the coefficients in the turbulenceModelCoeffsSubDict. For your model simply define dimensionedScalar Cmu,C1,C2,alphaZ and a switch anisotropic.
Second you have to set up the proper fields needed by the model in the startTime directory (k and epsilon for kEpsilon, k and omega for kOmegaSST etc etc) with the proper boundary conditions. For the QZeta model you just need k and epsilon (have a look at the code in src/turbulenceModel/incompressible/QZeta).
Hope this is clear,
Regards
Cosimo

msha September 28, 2007 03:08

Hi Cosimo Thank you for help
 
Hi Cosimo
Thank you for help
I'll do so.

Best regards.


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