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 › Problem about material numbers › Reply To: Problem about material numbers April 26, 2024 at 6:05 pm #8535 BobbieParticipant OK, thank you for your help. Best wishes!