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Boundary condition for k-omega SST model with high/low Re

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Old   April 12, 2019, 00:22
Default Boundary condition for k-omega SST model with high/low Re
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Jiadong Wang
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Hello everyone,

Im working on the flapping foil with the k-omega SST model. After looked at a number of posts about the boundary condition of k-omega SST model, Im still confused with that.

Currently, I employ the following BCs.

(1) High Reynolds number with y+ = 30 ~ 100:

Code:
k

airfoil
    {
        type            kqRWallFunction;
        value           $internalField;
    }


omega

airfoil
    {
        type            omegaWallFunction;
        value           $internalField;
    }


nut

airfoil
    {
        type            nutkWallFunction;
        value           uniform 0;
    }

(2) Low Reynolds number with y+ = around 1:

Code:
k

airfoil
    {
        type            fixedValue;
        value           uniform 1e-12;
    }


omega

airfoil
    {
        type            omegaWallFunction;
        value           $internalField;
    }


nut

airfoil
    {
        type            calculated;
        value           uniform 0;
    }
Am I correct for such setup of BCs in k-omega SST model?
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Old   April 12, 2019, 00:54
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By the way, I'm using OpenFoam v4.1
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Old   April 12, 2019, 02:30
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This thread may help;


One more time: wall functions - SST
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Old   April 12, 2019, 02:41
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Quote:
Originally Posted by mzzmrt View Post
Thanks for your reply.

I'll check this thread.
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Old   April 12, 2019, 03:12
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Quote:
Originally Posted by mzzmrt View Post
Hello mzzmrt,

I checked the thread you recommended, and its truly helpful.
Now, I basically understand the relation between y+ and whether use a wallFunction.

My last question is about the setup in OpenFoam. So is that right for my initial attached setup of k-omega SST model?
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Old   November 15, 2021, 10:40
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Quote:
Originally Posted by jiadongw View Post
Hello mzzmrt,

I checked the thread you recommended, and it’s truly helpful.
Now, I basically understand the relation between y+ and whether use a wallFunction.

My last question is about the setup in OpenFoam. So is that right for my initial attached setup of k-omega SST model?
Hello jiadongw,

I was wondering about the setup as well and found this topic: BC's for k-omega SST (low / hi Re setups)

Your post is quite old, so I truly hope you found an answer by then, but for others ending up here like I did it could help.
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