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 › HLBM boundary settings › Reply To: HLBM boundary settings September 9, 2021 at 11:32 am #5965 jjessbergerParticipant Hello, as far as I know, a particle-wall collision is not yet implemented in HLBM. Yours, Julius J.