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The Realizable k-e Model

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Old   April 2, 2007, 11:09
Default The Realizable k-e Model
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Sevcan
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If I ask "Why The Realizable k-e Model?" What is your answer?

Best whishes. Sevcan
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Old   April 3, 2007, 12:44
Default Re: The Realizable k-e Model
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A A S
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Hello,

"Realizable" actually implies that the model satisfies specific constraints on the reynold's stresses that make the model more consistent with the physics of turbulent flows and hence more accurate than the standard k-eps model.

Regards A A S
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Old   April 4, 2007, 10:32
Default Re: The Realizable k-e Model
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Brian
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Practically though, the real difference is that Realizable is better with separating flows (Standard k-e is notoriously for overpredicting the size of separation bubbles) and generally doesn't overpredict the production of turbulent viscosity as badly. It's about 15% more computationally expensive though.
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Old   April 5, 2007, 10:41
Default Re: The Realizable k-e Model
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Bak_Flow
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Brian,

don't you mean UNDERpredicting the size (and onset) of separation!

Where do you get the 15% more computationally expensive figure from?

Regards,

Bak_Flow
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