OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Advection-Diffusion with source term › Reply To: Advection-Diffusion with source term March 21, 2019 at 12:34 pm #4175 mithdradatesParticipant Hello Max, to 1 & 2: Okay, thank you! to 3: As far as I understand, I can use SuperFiniteDifference3D to calculate derivatives. Correct? to 4: I was looking for Neumann outflow condition (dP/dn = 0 – zero gradient) for pressure. Thanks again!