OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › BounceBack boundary › Reply To: BounceBack boundary July 22, 2021 at 12:49 pm #5844 AdrianKeymaster How do you define standard Bounce Back? OpenLB’s bounce back dynamics implement fullway bounce back (i.e. the populations are locally reverted during collision and not at streaming time).