A novel wall-particle collision model for arbitrary-shaped particle

A numerical scheme based on a discrete model is proposed for the wall-particle collision when a non-spherical particle falls on a wall surface under the gravitational field. In this model, contrary to conventional discrete methods (e.g. discrete element method), no repulsive force (torque) is added to particles during collision procedure. Instead, upon the detection of the collision, particle’s kinematics is modified based on 3D dynamics of a rigid particle such that it reaches to a realistic and physical steady-state. This method is developed to be coupled with the immersed boundary flow solver to simulate the sedimentation of arbitrary-shaped rigid particles in an incompressible Newtonian fluid. However, it also can be used in all discrete models in a various range of Reynolds numbers form high Reynolds number solid-gas to very low Reynolds number solid-liquid applications.