OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › 2D and 3D HLBM object contact stiffness › Reply To: 2D and 3D HLBM object contact stiffness November 28, 2019 at 12:15 am #4681 mathiasKeymaster For it, you need to change the source code to add an additional force according to the paper in ParticleDynamics2D. In the examples we did not add a particle-particle force.