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Forum: OpenFOAM Running, Solving & CFD

January 13, 2014, 03:32

Replies: 9

Turbulent thermal conductivity

Views: 10,390

Posted By Anne Lincke

Dear Peter, I think if your mesh is fine...

Dear Peter,

I think if your mesh is fine enough you can set kappat like that.
What kind of boundary is boundary "Top" in your case?

In which sense does the simulation blow up? Residuals?...

Forum: OpenFOAM Running, Solving & CFD

January 8, 2014, 08:08

Replies: 9

Turbulent thermal conductivity

Views: 10,390

Posted By Anne Lincke

Hey Peter, there are wall functions for...

Hey Peter,

there are wall functions for kappat, namely

which you can use at the wall.

On the other boundaries you can set kappat to "calculated" as it is computed from nut, which is computed...

Forum: OpenFOAM Running, Solving & CFD

September 10, 2012, 06:05

Replies: 9

Turbulent thermal conductivity

Views: 10,390

Posted By Anne Lincke

Hey Tiffany, kappa_eff is the sum of...

Hey Tiffany,

kappa_eff is the sum of kappa_t and kappa.
The ladder is computed from nu/Pr which are defined in constant/transportProperties.

Kind Regards
Anne

Forum: OpenFOAM Running, Solving & CFD

November 25, 2011, 03:47

Replies: 9

Turbulent thermal conductivity

Views: 10,390

Posted By Anne Lincke

As far as I know k_eff = v/Pr + nu_t/Prt ...

As far as I know k_eff = v/Pr + nu_t/Prt

where nu is the kinematic viscosity, nu_t the turbulent viscosity and Pr and Pr_t Prandtl-number, laminar and turbulent, respectively.

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