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Old   January 9, 2001, 11:00
Default Buoyancy
  #1
Elton
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Dear All,

I am now simulating air flow patern driven by buoyancy. Could anyone tell me what turbulence model should I use and what should I do with other definitions in fluent 4.5. Thanks a lot.
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Old   January 9, 2001, 13:31
Default Re: Buoyancy
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Evan Rosenbaum
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Elton, we've gotten good results for buoyancy-driven air flows using the standard kappa-epsilon turbulence model. Don't use the Bousinnesq approximation with buoyancy unless you have really small temperature gradients.
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Old   January 10, 2001, 09:11
Default Re: Buoyancy
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Elton
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Hi Evan,

Thanks for your response. Could you tell me what fluent code are you using because fluent 4.5 doesn't have standard Kappa-epsilon turbulence model.
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Old   January 10, 2001, 13:22
Default Re: Buoyancy
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Evan Rosenbaum
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We've used FLUENT 4.32, 4.48, 5.1 and 5.4.8.
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Old   January 10, 2001, 15:34
Default Kappa-Epsilon??
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Clinton Lafferty
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kappa-epsilon? Are you refering to the k-epsilon turbulence model based on kinetic energy and turbulent dissipation? If not, please provide a reference.

Thanks, Clinton
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Old   January 11, 2001, 08:30
Default Re: Kappa-Epsilon??
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Elton
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Yes, I got you. Kappa-epsilon is K-e turbulence model.
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