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which turbulence model to use for buoyancy ?

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Old   January 5, 2016, 10:35
Default which turbulence model to use for buoyancy ?
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cglr
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Hello,

Im dealing with a simulation including a narrow duct. walls have a temperature. air is blown by a fan at upper left side and also entering duct freely at the bottom and rises as it gets heat. So my model has both turbulence(the region that is affected by fan) and natural convection(where there is no fan effect).

I need to get heat transfer rate from walls.

Should I use sst model or k-e enhanced model with full buoyancy effects option?

or other way to ask > Is sst model sensitive to buoyancy ?
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Old   January 5, 2016, 11:15
Default k-e model
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Mikki Seidenschnur
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Hi

I do not have any references at hand, but I know that k-epsilon with "Full bouyancy" checked, is the only one using full effects of bouyancy.

Feel free to ask more questions
/Mikki Seidenschnur

http://www.cfd-online.com/Wiki/SST_k-omega_model <- Look at this. As they say, SST k-omega should be used for Low-Re turbulence model. It will switch automatically to k-e behaviour in free streams.

Last edited by Mikki; January 5, 2016 at 11:24. Reason: References
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Old   January 7, 2016, 07:18
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cglr
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Hi Mikki,

I understand from your link that it could also be used for low-re turbulence model. Having referenced many sources, I can say that for heat transfer simulations SST model is highly recommended. But I am not sure when it comes to use it for boussinesq model with gravity. Thanks for your help.
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