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 › Periodic Outlet Boundary Conditions ( nonequilibrium extrapolation method) › Reply To: Periodic Outlet Boundary Conditions ( nonequilibrium extrapolation method) March 29, 2023 at 4:19 pm #7328 Henderson_CParticipant Dear Fedor, Can you show me both implementations as I am now indecisive of which method to use.