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-   -   How about temperature wall function ? (http://www.cfd-online.com/Forums/openfoam/80664-how-about-temperature-wall-function.html)

panda60 October 2, 2010 23:29

How about temperature wall function ?
 
Dear all,
I am confused about kqRWallFunction.
I know k is turbulent kinetic energy, and R is Renolds stress. what's the meaning of q ?

Because in buoyant flow, temperature also need a wallfunction like velocity. But I don't know how to use this in OpenFOAM.

Thanks.

romant August 15, 2013 04:55

Quote:

Originally Posted by panda60 (Post 277528)
Dear all,
I am confused about kqRWallFunction.
I know k is turbulent kinetic energy, and R is Renolds stress. what's the meaning of q ?

Because in buoyant flow, temperature also need a wallfunction like velocity. But I don't know how to use this in OpenFOAM.

Thanks.

OpenFOAM has a turbulence model called qZeta, in which q = k^(1/2), which is set with the same wall function. The wall function just sets k, q and R to 0 at the wall.


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