my velocity fields always start diverging , no matter how much i refine the mesh. I try to find out lift and drag numbers for a glider but i haven’t gotten any results yet. from the toturials i found its not clear to me whats going wrong.
Thx for help!
Hi there, this is Fillia, thank you for using the forum 
I have a few comments/tips:
You can use Symmetry and the domain sizing as in Figure 6 here: Compressible Flow Around a Wing | Tutorial | SimScale
Change the Wall 3 to Slip walls instead of No-slip walls, so they are modelled as an open air environment.
Activate the Potential flow initialization on the Simulation Control menu.
Use these guides as well when divergence occurs:
Best regards,
Fillia
thx it worked out!