New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Knudsen Number › Reply To: Knudsen Number September 13, 2021 at 11:44 am #5984 mathiasKeymaster √(γπ/2) is a constant in an incompressible isothermal set up!