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-   -   Turblence model in fluent (http://www.cfd-online.com/Forums/fluent/121249-turblence-model-fluent.html)

star July 24, 2013 12:42

Turblence model in fluent
 
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..

upeksa July 24, 2013 21:22

Quote:

Originally Posted by star (Post 441740)
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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