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K-E vs RNG Turbulent MOdel

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Old   January 8, 2009, 04:55
Default K-E vs RNG Turbulent MOdel
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CK
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All Can any one advice which turbulent models (K-e vs RNG) is suitable to use for highly turbulent flow? and what is the pro and con's?

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Old   January 8, 2009, 19:05
Default Re: K-E vs RNG Turbulent MOdel
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michael barkhudarov
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RNG k-e model is preferable. It better handles transitional flows and different turbulent length scales. The main difference from the standard k-e model is that some coefficients that are constants in the standard model are functions of the flow parameters in the RNG model.

Michael
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Old   January 8, 2009, 22:56
Default Re: K-E vs RNG Turbulent MOdel
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CK
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Michael So is that mean RNG K-e is more stable turbulent model to use?

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Old   January 9, 2009, 01:18
Default Re: K-E vs RNG Turbulent MOdel
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michael barkhudarov
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CK,

What do you mean by more stable?
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Old   January 9, 2009, 03:59
Default Re: K-E vs RNG Turbulent MOdel
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CK
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Michael it is refer to free from convergence issue & produce correct results. so is RNG better than standard k-e turbulent model?
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Old   January 9, 2009, 11:48
Default Re: K-E vs RNG Turbulent MOdel
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michael barkhudarov
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Yes, I think, the RNG model is better in that it better accounts for turbulence, but both models are equally stable.
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Old   January 11, 2009, 04:17
Default Re: K-E vs RNG Turbulent MOdel
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CK
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Michael Thanks for feedback.
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