[jck]

Hello,

i have to calculate and analyze the flow around a NACA 4412 airfoil. The cp plot is similar to experimental data of the NASA:
http://turbmodels.larc.nasa.gov/naca4412sep_val.html

I use the kOmegaSST model with wallfunctions and a y+ of around 100. The checkMesh command gives the result ok.

The difference between my results and the plot of the nasa is a "step" in my cp progress (cp15deg.jpg)

It looks like a separation bubble from a laminar to turbulent flow. But the flow should be turbulent everywhere. Does anyone heard something about transition problems with wall functions?

Thanks in advance
Claus