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-   -   K-E vs RNG Turbulent MOdel (https://www.cfd-online.com/Forums/flow-3d/27322-k-e-vs-rng-turbulent-model.html)

CK January 8, 2009 04:55

K-E vs RNG Turbulent MOdel
 
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?


michael barkhudarov January 8, 2009 19:05

Re: K-E vs RNG Turbulent MOdel
 
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

CK January 8, 2009 22:56

Re: K-E vs RNG Turbulent MOdel
 
Michael So is that mean RNG K-e is more stable turbulent model to use?


michael barkhudarov January 9, 2009 01:18

Re: K-E vs RNG Turbulent MOdel
 
CK,

What do you mean by more stable?

CK January 9, 2009 03:59

Re: K-E vs RNG Turbulent MOdel
 
Michael it is refer to free from convergence issue & produce correct results. so is RNG better than standard k-e turbulent model?

michael barkhudarov January 9, 2009 11:48

Re: K-E vs RNG Turbulent MOdel
 
Yes, I think, the RNG model is better in that it better accounts for turbulence, but both models are equally stable.

CK January 11, 2009 04:17

Re: K-E vs RNG Turbulent MOdel
 
Michael Thanks for feedback. :)


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