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Turblence model in fluent

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Old   July 24, 2013, 11:42
Default Turblence model in fluent
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Harry
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Hello friends. I want to simulate flow around 2D airfoil at low Reynolds number. The flow is considered as incompressible. I want to know a basic question about turbulence model.
Which model should I use in RANS, K-epsilon and k-w and Why?
If I use one in place of other model where will be the difference in results or what will be the effect on accuracy of results?
I will be thankful for suggestions..

Last edited by star; July 25, 2013 at 02:40.
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Old   July 24, 2013, 20:22
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Antonio
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Quote:
Originally Posted by star View Post
Hello friends. I want to simulate flow around 2D airfoil at low Reynolds number. I want to know a basic question about turbulence model.
Which model should I use in RANS, K-epsilon and k-w and Why?
If I use one in place of other model where will be the difference in results or what will be the effect on accuracy of results?
I will be thankful for suggestions..
If I were you, I wouldn't use any of them, the most correct model in your case is the Spalart-Allmaras model (check page 45 in your fluent theory guide for further information).


If you still want to use the k-epsilon or k-w model, I think the most accurate would be the k-epsiolon enhanced wall treatment. Use the k-w model only in simulations with high Reynolds number, which is not your case.

Anyway, use the Spalart-Allmaras model.

I hope you find my suggestions useful.

Best regards
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