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 › Different Diffusion Coefficients in one Simulation › Reply To: Different Diffusion Coefficients in one Simulation December 19, 2024 at 3:35 pm #9623 beko337Participant I just tried it that way, but the problem persists.