Wing lift at low velocity

I would like to measure to lift and drag of a wing for a sailing boat at different angles of attack. I want to find the point where the wing stalls, but somehow the lift in y direction is becoming bigger and bigger, even though the flow should have stalled already.

And I also noticed that the velocity at 25deg final ist more then the initial velocity at the inlet.

Hey there, and thanks for using the forum!

I can see that you are using a wall function model for the wing. If you want to predict flow separation and the stall effect, you need to use full wall resolution, as outlined here:

Be aware that you will need to modify your mesh setup to achieve a y+ < 1. Refer to this pages:


Okay understood. But why is there a higher velocity then initiated at run “25deg final”.