OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Velocity at the wall › Reply To: Velocity at the wall February 1, 2022 at 10:39 am #6302 mathiasKeymaster Depending in the Y+/Re value you need to futher resolve the tubulent noundary layer or model it using a wall function approach. You should observe that its getting the better the finer you chose the mesh. Best Mathias