OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Inlet of different density › Reply To: Inlet of different density October 7, 2022 at 10:16 am #6895 mathiasKeymaster Usually for multiphase/component flows you define inlets by setting the density and outlets by a velocity boundary. Just the other way around you would usually do it for single phase flows.