Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › add gravity leads to instability, bifurcation 3D, multiphase, particles › Reply To: add gravity leads to instability, bifurcation 3D, multiphase, particles October 16, 2019 at 7:18 pm #4599 Manuel BergerParticipant Dear Mathias, thank you very much! Best, Manuel