Solving Boundary Layer
Hi everybody,
I'm setting a low-Re stady-state case using simpleFoam. I'd like to use KOmegaSST turbulent model solving directly the BL because I set y+ lower than 1. I guess I have to set k=0, but how can I set omega at the wall, if I don't want to use any wall-functions? Thank you in advance. |
Hi,
http://www.cfd-online.com/Wiki/Turbu...ary_conditions here you can find the initial values you want to calculate. Setting k=0 means, that the fluctuating part of the velocity is zero. Does that make sense in your case? Best |
I think that k have to be 0 beacuse the velocity fluctuactions at the wall are 0. I think that with that formulas I can compute omega=0 at the walls but I don't know if it is correct.
Bye |
Hi,
well good question. The way I did this for "k" was normally to use the kqRWallFunction at walls: Code:
type kqRWallFunction; Code:
type turbulentIntensityKineticEnergyInlet; By the way: I found these lines in some tutorial files and used them for my simulations. If you search in the tutorials you mostly find what you need. Best |
I set exactly this function at the inlet patch, in fact I know the initial conditions at the inlet. Actually I'm talking about walls (it is a flat plate placed in the middle of the domain). I don't know if using the omegaWallFuction it automatically will avoid the WallF hence calculate the BL.
Bye |
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