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k-omega SST no wall fuction, K omega values?

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Old   March 20, 2017, 12:24
Default k-omega SST no wall fuction, K omega values?
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Matteo Biazotti
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hello foamers, I'm a bit of a newbie to the software. ive been trying to use the k-omega SST model without a wall function. i have my Y+~ 1, but i am still wondering what values for K and Omega to use in the initial conditions.

i have found several different sources to giving different equations to calculate the these values.

currently using:
k=10e-6*U^2
Omega = 5U/L

l=chord length
this is to model the tip-vortex of a hydrofoil.
Reynolds number ~ 1.5e6

anyadvice is much appreciated
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Old   March 23, 2017, 16:14
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Khamlaj
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Hi mash,

If you are not using wall function i.e y+<6, the following initial condition for k and omega should be used.

k@omega.png

Note: for omega use 1e+10 instead of minus (close to the infinity) but you have the freedom to try them both.

Best,
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