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Old   February 9, 2005, 18:01
Default k-omega, cross diffusion
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Emre
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I am trying to implement k-omega turbulence model. For free shear (wake), turbulent visciosity is increasing. I have to increase w porduction but how? adding cross diffusion is not enough. Any help will be appreciated.. thanks
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Old   February 12, 2005, 07:25
Default Re: k-omega, cross diffusion
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dd
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It would be preferable to use a mixed model of k-w - k-e type (BSL Model) dd nvs
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Old   February 12, 2005, 18:19
Default Re: k-omega, cross diffusion
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Emre
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Thank you very much for responding. I get over the problem by multiplying w production by an artificial constant (between 1-10) that is dependent on the w value and aspect ratio (which affects the diffusion of omega) of the grid cells. But I will definitely start modifying to BSL method. One more general question. How the wake calculations affect the values in the wall boundaries of airfoil? Would the smoothing that I used (made up) affect the solution too much?
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Old   February 13, 2005, 10:23
Default Re: k-omega, cross diffusion
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dd
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Hello, Emre I am very busy, therefore i will answer you a later. But I think that the paper of Balakumar(**) can bring brief replies to you se you soon dd ** : P. Balakumar, Computations of Flow Over a Hump Model Using Higher Order Method With Turbulence Modeling , 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, AIAA 2005-1270, January 10-13, 2005, pp. 20

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Old   February 13, 2005, 17:24
Default Re: k-omega, cross diffusion
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Emre
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Thank you dd. I will search for this paper. see you..
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