[jiadongw]

Hello everyone,

I’m 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, I’m still confused with that.

Currently, I employ the following BC’s.

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

‘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:

‘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 BC’s in k-omega SST model?

[jiadongw]

By the way, I'm using OpenFoam v4.1

[mzzmrt]

This thread may help;


One more time: wall functions - SST

[jiadongw]

Originally Posted by mzzmrt

This thread may help;


One more time: wall functions - SST

Thanks for your reply.

I'll check this thread.

[jiadongw]

Originally Posted by mzzmrt

This thread may help;


One more time: wall functions - SST

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?

[BenGher]

Originally Posted by jiadongw

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.