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Old   September 25, 2008, 12:48
Default modeling turbulence
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Gabriella
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I want to study the turbulence inside an isothermal reactor. What is the better model I can use? Until now I have used only k-epsilon model.Is it correct this model for such study or is better another model?
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Old   September 26, 2008, 11:59
Default Re: modeling turbulence
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John S
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Each model has its own advantages and disadvantages so the choice of model is up to the user based on what flow characteristics you want to capture. K-epsilon models are good for modeling the freestream but tend to lose their accuracy in the near wall simulation, whereas k-omega models are the opposite. The SST formulation of the k-w model tries to blend k-w near the wall and k-e near the freestream. It has the disadvantage of over-predicting the onset and reattachment of flow separation, though. There's a great deal of literature available from Fluent on the theory behind the difference turbulence models.
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