OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Drag Force (Coefficient) › Re: Drag Force (Coefficient) August 31, 2016 at 7:30 pm #2443 mathiasKeymaster There is the CFL condition. But there is also a lot of experiance due to boundary conditions, the LBM modell, the actual flow domain, …