K-E vs RNG Turbulent MOdel

January 8, 2009, 03:55

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?

January 8, 2009, 18:05

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

January 8, 2009, 21:56

Michael So is that mean RNG K-e is more stable turbulent model to use?

January 9, 2009, 00:18

CK,

What do you mean by more stable?

January 9, 2009, 02:59

Michael it is refer to free from convergence issue & produce correct results. so is RNG better than standard k-e turbulent model?

Chika_3045 · January 9, 2009, 10:48

Yes, I think, the RNG model is better in that it better accounts for turbulence, but both models are equally stable.

January 11, 2009, 03:17

Michael Thanks for feedback.

January 8, 2009, 03:55	K-E vs RNG Turbulent MOdel	#1
CK Guest Posts: n/a	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?

January 8, 2009, 18:05	Re: K-E vs RNG Turbulent MOdel	#2
michael barkhudarov Guest Posts: n/a	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

January 8, 2009, 21:56	Re: K-E vs RNG Turbulent MOdel	#3
CK Guest Posts: n/a	Michael So is that mean RNG K-e is more stable turbulent model to use?

January 9, 2009, 00:18	Re: K-E vs RNG Turbulent MOdel	#4
michael barkhudarov Guest Posts: n/a	CK, What do you mean by more stable?

January 9, 2009, 02:59	Re: K-E vs RNG Turbulent MOdel	#5
CK Guest Posts: n/a	Michael it is refer to free from convergence issue & produce correct results. so is RNG better than standard k-e turbulent model?

January 9, 2009, 10:48	Re: K-E vs RNG Turbulent MOdel	#6
michael barkhudarov Guest Posts: n/a	Yes, I think, the RNG model is better in that it better accounts for turbulence, but both models are equally stable. Chika_3045 likes this.

January 11, 2009, 03:17	Re: K-E vs RNG Turbulent MOdel	#7
CK Guest Posts: n/a	Michael Thanks for feedback.

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