New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › Bug Reports › instability problem › Re: instability problem February 20, 2012 at 8:32 am #2048 mathiasKeymaster Yes, I propose to chose a higher resolution of the mesh and smaller uMax.rnMathias