OpenLB – Open Source Lattice Boltzmann Code › Forums › on Lattice Boltzmann Methods › General Topics › multi-block approach › Reply To: multi-block approach July 5, 2022 at 1:34 pm #6707 janParticipant Could you provide more information on your problem? Which example do you consider, how does your config.mk look like, etc? My first guess would be that you’re only setting one cuboid in your simulation setup.