[Aeronautics El. K.]

Hi all,

I'm trying to simulate the flow over a simple wing and I'm mostly interested in the transition onset. I'm using a structured mesh and the transition SST k-w model in Fluent. The Reynolds number is about 2e6 and I have tried the coupled solver and the SIMPLE (low speed (28m/s) incompressible flow). However, I don't think I'm getting very sensible results. The mesh I've used for this preliminary analysis is about 2 million cells and the y+ value is below 1 (1.10 max).

Also, in the boundary conditions I leave the intermittency to the default value (1) and I use the intensity and length scale as well (where for the lenght scale I use the 0.4 times the boundary layer thickness).

I suspect that the grid is relatively coarse. I do have two finer grids (about 4 and 8 million cells). Apart from this however, is there anything else I should have in mind that escapes my attention? Which solver would you recommend and what boundary conditions for the turbulence model?

Thanks for your help.

Lefteris