OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › divergence due to uniform inlet profile in square channel › Re: divergence due to uniform inlet profile in square channel April 10, 2018 at 9:21 am #2823 MarcParticipant Hey, it looks like you have problems with your geometry setup (material number config). Why you want to use uniform velocity at the inflow (plug flow). See the cylinder3d example and use it as a starting Point. Best Marc