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-   -   Gamma in USRDIF???? (http://www.cfd-online.com/Forums/cfx/19547-gamma-usrdif.html)

windhair March 31, 2003 04:56

Gamma in USRDIF????
 
Hello, all I'm a little confused with the gamma value in USRDIF, what is the relation between Gamma and diffusivity coefficient? thanks.

Urgent.

Alex April 1, 2003 10:36

Re: Gamma in USRDIF????
 
Gamma is the matrix of the diffusivity coefficients for all cells.

windhair April 2, 2003 09:38

Re: Gamma in USRDIF????
 
Thx, for isotropic, only GAMMA(ICELL, IPHASE, 1) was used, it this true? and this number will equal the diffusivity coefficient or not? The example set it to 2, that seems not the diffusivity. What is the value come from?

Alex April 2, 2003 10:04

Re: Gamma in USRDIF????
 
Yes, that is true. And this number equals the diffusivity coefficient. I don't know why they used 2 in the example.


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