OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Venturi3d example › Re: Venturi3d example July 9, 2018 at 10:45 pm #2869 LaurentDelaonParticipant hi mathias, is cylinder 2d use air ? how represent air ? can I put pression for inflow and outflow? like a delta P ? laurent