boundary layer mesh quality

Francesco

Hello everyone,

I am trying to mesh a turbine blade using Gambit 2.2.30 and I am facing some problems with the boundary layers. I have defined boundary layers on the suction and pressure sides of the blade. Close to the trailing edge (where the surface has a very high curvature) I am getting very skewed elements. The reason for this seems to be that the growth direction of the boundary layer in this region of high curvature is not perpendicular to the surface. Is there a way to improve this, for example tweaking the boundary layer defaults? I have tried to modify some values of the default parameters, but I wasn't too sure about what I was really doing, considering the fact that on the manual only a couple of (not very clear) lines of explanation are given for each of the commands.

Thank you Francesco