|March 28, 2010, 19:15||
reynolds shear stress
Join Date: Jan 2010
Posts: 5Rep Power: 7
How can I build a scalar scene for the Reynolds shear stress?I have to select some in the physics model?or something else?
In the field functions this stress doesn't appear!!!
I am using k-epsilon model or k-omega model for the turbolence!
Thanks to all!
|March 29, 2010, 13:48||
Join Date: Feb 2010
Posts: 10Rep Power: 7
I think you have to write your own unless the RST model is activated. At least that's what I had to do.
here is what I had in 2D, it was supposed to give me a vector: RS[ii],RS[jj],RS[ij] but the last term [ij] is wrong as I wasn't sure how to get du/dy, or dv/dx (simply). I abandoned it as I had other more pressing things to work on.
it came from http://www.cfd-online.com/Wiki/Bouss...ity_assumption
with StarCCM defining the strain rate tensor in eqn  (Search StarCCM Help)
If you come up with an answer though it would be helpful.
|July 8, 2010, 16:25||
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
Posts: 366Rep Power: 8
Can't you just multiply the velocity correlations, e.g., uu, by the density? The velocity correlations are directly extractable from CFX-Post.
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