SimScale CAE Forum

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.

https://www.simscale.com/workbench/?pid=3372225373145318918&mi=spec%3Ac881037d-f03a-4901-9a12-69693bceecb1%2Cservice%3ASIMULATION%2Cstrategy%3A6

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:

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