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Buoyant Terms in k-epsilon

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Old   December 19, 2017, 13:41
Post Buoyant Terms in k-epsilon
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Raphael Santos
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Hello all,

I am quite interesting in add the buoyant terms in k-epsilon model in OpenFOAM, but I am not sure how the best way to do this.

Is there an option to add buoyancy effects using fvOptions? Or do I need to modify the code?

I know there is a buoyantKEpsilon for compressible flow, but I want to modify RNG kEpsilon.

Regards,
Raphael
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Old   April 19, 2019, 08:24
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Jianrui Zeng
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Quote:
Originally Posted by rrsantos View Post
Hello all,

I am quite interesting in add the buoyant terms in k-epsilon model in OpenFOAM, but I am not sure how the best way to do this.

Is there an option to add buoyancy effects using fvOptions? Or do I need to modify the code?

I know there is a buoyantKEpsilon for compressible flow, but I want to modify RNG kEpsilon.

Regards,
Raphael
There is Gcoef in buoyantKEpsilon.C. Shouldn't you move this term to you model to create the buoyancy term?
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Old   May 9, 2019, 03:52
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Agustín Villa
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Yes, you should mimic what you have in the compressible buoyantKEpsilon model, but check also how you express the incompressibility effects.
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Old   May 9, 2019, 08:49
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Raphael Santos
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Hi Jianrui and Agustín,



thanks for the help.



I used the buoyantKEpsilon in OpenFOAM and modified it to apply in an incompressible solver. I posted it as a reply in another post. The link is bellow



production due to buoyancy in turbulence models in openfoam
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