i also use the k-omega-sst turbulence model.
for walls, i use nutkWallFunction. nut takes really small values at walls, like you assumed, but in my case never is 0. (e-5 to e-10) your equation for nut is correct. here is the link to the model: https://www.openfoam.com/documentati...omega-sst.html |
"calculated" means to calculate the quantity based on the way it should be calculated, instead of doing something to it. So you are right, if you use "calculated" on nut, it means you calculate nut based on how it should be calculated, i.e., from the model itself.
I'm not so sure about having such a fine mesh for RANS though. To me, the whole idea of using RANS is to reduce computational resources. So, the mesh doesn't have to be very fine, and wall models are used to give reasonable results for a coarse mesh (especially towards the wall). Maybe you are having troubles getting reasonable results when using wall models? If that's the case do you mind share the problems? I'm kind of interested. |
Hello,
In the formula for calculating nut, what are the symbols F_23 and S? Thanks. |
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