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simpleFoam kOmegaSST k, w and nut initial and boundary values

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Old   December 6, 2021, 01:22
Default simpleFoam kOmegaSST k, w and nut initial and boundary values
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Ezel Bayraktar
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Hello Everyone,

I am trying to simulate flow over an airfoil using simpleFoam and turbulence model kOmegaSST. I have taken k, w and nut values from http://ichrome.com/blogs/archives/342 and http://www.wolfdynamics.com/tools.html?id=110. But after several iterations, soltion diverges. After changing these values many times, I have obtained a stable solution. My question is; how could we select values of these turbulence parameters.

with all respect...
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Old   December 6, 2021, 13:28
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Ali Can
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Hi Ezel, if you are sure that the turbulence coefficients you use are correct, you can try to reduce the relaxation factors to get stable results.

Eyşan Tezcan Atay
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Old   December 6, 2021, 13:32
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Eren
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You need to share your log so people can see/understand whats happening. A simulation can diverge from hundreds of reasons.
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Old   December 30, 2021, 07:08
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Ezel Bayraktar
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Quote:
Originally Posted by Ryuzaki View Post
Hi Ezel, if you are sure that the turbulence coefficients you use are correct, you can try to reduce the relaxation factors to get stable results.

Eyşan Tezcan Atay
Niye lan niye...
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komega sst model, komegacoeffs, simplefoam convergence

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