k-omega turbulence model: having difficulty diagnosing flaws

hamidciv · January 7, 2016, 03:45

hello dear friends

i need to Deficiencies of k-omega model?
whether it depend on both parameter (k , omega) or only one parameter?
Where (e.g BC, IC) the exact value of these parameters And type of them (e.g k or omega) is important?
I did not the perfect reference for it, if your possible , please help me about Deficiencies of this model?
i also read the manual of cfx, but it dont solve my problem.

thanks a lot for any comments
best regards
hamid

-Maxim- · January 7, 2016, 10:15

Hi Hamid,

I'm not sure if I understand what you are asking for... Are you looking for general advantages and disadvantages of the k-e-model? I'm sure you will find a lot of them in scientific papers and books. When I was studying the different turbulence models, books like Wilcox' "Turbulence Modeling for CFD" helped me a lot. For a quick overview, you can also use this.
In the literature, you will also find explanations and information about the parameters.

Opaque · January 7, 2016, 10:26

You can read Wilcox's book on turbulence (a mandatory reading for anyone starting in turbulence modeling)

https://secure45.securewebsession.co...1928729088.htm

Or a Menter's work (a mandatory reading of neither K-epsilon or k-omega are the better than each other)

Menter, F. R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications," AIAA Journal, Vol. 32, No. 8, August 1994, pp. 1598-1605.

January 7, 2016, 03:45	k-omega turbulence model: having difficulty diagnosing flaws	#1
hamidciv Senior Member Hydreaulic structures Join Date: Sep 2012 Posts: 283 Rep Power: 14	hello dear friends i need to Deficiencies of k-omega model? whether it depend on both parameter (k , omega) or only one parameter? Where (e.g BC, IC) the exact value of these parameters And type of them (e.g k or omega) is important? I did not the perfect reference for it, if your possible , please help me about Deficiencies of this model? i also read the manual of cfx, but it dont solve my problem. thanks a lot for any comments best regards hamid Last edited by hamidciv; January 7, 2016 at 04:55.

January 7, 2016, 10:15		#2
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 415 Rep Power: 12	Hi Hamid, I'm not sure if I understand what you are asking for... Are you looking for general advantages and disadvantages of the k-e-model? I'm sure you will find a lot of them in scientific papers and books. When I was studying the different turbulence models, books like Wilcox' "Turbulence Modeling for CFD" helped me a lot. For a quick overview, you can also use this. In the literature, you will also find explanations and information about the parameters. hamidciv likes this.

January 7, 2016, 10:26		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	You can read Wilcox's book on turbulence (a mandatory reading for anyone starting in turbulence modeling) https://secure45.securewebsession.co...1928729088.htm Or a Menter's work (a mandatory reading of neither K-epsilon or k-omega are the better than each other) Menter, F. R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications," AIAA Journal, Vol. 32, No. 8, August 1994, pp. 1598-1605. hamidciv likes this.

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