Due to recent bot attacks, newly registered users are required to send a message via our contact form in order to be able to post in the forum. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › airfoil in OpenLB › Re: airfoil in OpenLB March 30, 2017 at 11:15 am #2565 mathiasKeymaster You should use Bounce Back as boundary condition. Best Mathias