[Leifheit]

Hello everyone,

I came across quite a weird problem.
I am simulating 2D flow around an airfoil with CFX. I am using the SST Gamma Theta Transition Model. The mesh is generated with ICEM.

My simulations reach convergence (1st attached picture) and everything seemed to be fine (velocity / pressure field / ... ) - then I took a look at the wall shear behaviour (2nd attached picture) - its is really jumpy which isnt right.

Now this might not sound like a meshing problem but I ve tried changing a lot of different parameters in CFX all with no success. Then I used a mesh a colleague of mine created with the exact same settings for CFX (considering turbulence model / settings / ... ) resulting in good results - thats why I am pretty sure this is a meshing problem.

I already did a mesh study on this (Yplus, streamwise grid refinement, cell expansion rate) but nothing solved the problem so I think there might be something wrong with the way I created my mesh.
Ive also attached the .rpl file of my mesh. (3rd attachment)

Hope anyone has ideas on this since Its really bugging me and I want to know whats wrong

If you need any additional information be sure to tell me !

Best Regards,

Leif