Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › airfoil2d example case diverges after some time steps › Reply To: airfoil2d example case diverges after some time steps August 21, 2025 at 1:53 am #10676 mwkimParticipant Thanks for your comment. After I set 0-degree AoA, the simulation runs without any problems.