OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Poiseuille 2D physical kinematic viscosity (no output) › Reply To: Poiseuille 2D physical kinematic viscosity (no output) August 5, 2021 at 2:42 am #5889 achodankarParticipant This problem is fixed. I had to change the lattice relaxation time. All is good now