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 › code blockGeometryStructure2D.hh. › Re: code blockGeometryStructure2D.hh. August 27, 2018 at 11:18 am #2912 LaurentDelaonParticipant I think its an efficiency issue… Maybe I made mistake ?