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-   -   Question about "buoyantBoussinesqSimpleFoam" (http://www.cfd-online.com/Forums/openfoam-bugs/82699-question-about-buoyantboussinesqsimplefoam.html)

panda60 December 2, 2010 21:27

Question about "buoyantBoussinesqSimpleFoam"
 
Dear all:
I have some question on RANS model of buoyant solver. I have looked this solver carefully, but I can't fine how this solver construct k and epsilon equation. As I know, in simpleFoam, k and epsilon equation only include production term by shear stress P, but in buoyant flow, k and epsilon equation also should include production term by buoyant G. But I can't find these buoyant term in k and epsilon equation.
dk/dt=.......+P+G-epsilon;
de/dt=.......+e/k(C1*P+C2*G-C3*e).

Am I right ? Who can give me some explanation ? thanks!

panda60 December 2, 2010 21:29

I check again, I think indeed k and epsilon equation doesn't include buoyant term for buoyantBoussinesqSimpleFoam.

eugene December 3, 2010 08:02

None of the turbulence models include any modifications for buoyancy.

panda60 December 14, 2010 09:04

Dear eugene ,

Thank you very much.


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