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-   -   Eddy Viscosity Model Parameters (http://www.cfd-online.com/Forums/cfx/71791-eddy-viscosity-model-parameters.html)

Tristan January 14, 2010 16:26

Eddy Viscosity Model Parameters
 
Does anyone know where the turbulent Prandtl number, and turbulent Schmidt number for additional variables are set inside CFX-Pre? I'm using the k-epsilon model along with the total energy equation and a transport equation for an additional variable. I can find where all the model constants are defined for the k and epsilon equations, but not for the total energy equation (turbulent Prandtl number) and the additional variable transport equation (turbulent Schmidt number).

Thanks,

Tristan

ghorrocks January 14, 2010 17:52

If you can't find a keyword in CFX-Pre then look in the RULES file. It has the complete listing of the available CCL commands. It is in <CFX_ROOT>/etc/RULES

Tristan January 14, 2010 18:46

Glenn,

Does that mean that those parameters (turbulent Prandtl number and turbulent Schmidt number) are "hardwired" into the code? If I wanted to I could change the k-epsilon model coefficients in CFX-Pre, but I can't do the same for the total energy equation and additional variable equation?

Thanks,

Tristan

ghorrocks January 16, 2010 00:08

CFX-Pre does not access the full CCL. Some commands need to be set using CCL. The RULES file is the complete syntax. Don't edit the RULES file or you will simply break CFX.

Tristan January 20, 2010 14:59

Glenn,

Which tutorial provides details on how to set commands with CCL?

Tristan

Tajnesaie January 20, 2010 16:25

Which tutorial provides details on how to set commands with CCL?
 
Hi
I think that for any problem it is diffrent. For example in free surface problems you can see the tutorial 7.
God luck
Tajnesaie


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