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-   -   Turbulent Schmidt Number in SST model ? (http://www.cfd-online.com/Forums/cfx/21901-turbulent-schmidt-number-sst-model.html)

David December 5, 2005 05:43

Turbulent Schmidt Number in SST model ?
 
There are some relations between the model parameters in SST model, such as beta_star/beta=1~1.25, alpha=f(beta,beta_star,sigma_w)..., but what the relations or how to determine the Turbulent Schmidt Number sigma_k and sigma_w, which control the diffusion rate of turbulence from higher-level regions to lower-level ones.

CFX gives the values sigma_k1=2,sigma_w1=2,sigma_k2=1,sigma_w2=1/0.856, but it does not explain how to get them. I try to change the set of the standard model constants to adapt my case, and I want to know the guide to determine these two important parameters. Thanks.


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