Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › 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 AnonymousInactive I just tried it that way, but the problem persists.