Investigation of hydrodynamic forces on non-spherical particles during rebound on a flat surface

A sharp-interface curvilinear immersed boundary (CURVIB) method is used to simulate the fluid-structure interaction for three-dimensional, single, non-spherical particles for a gravity-driven fall and rebound on a flat surface in a viscous fluid. Kinematic equations of motion are implemented to compute the 6 degrees of freedom for the particle's motion before, during, and after the collision. The coefficient of restitution is set from experimental data found in the literature and used in our kinematic-based collision model. Sensitivity studies for the grid, domain, and boundary conditions are performed to ensure the independence of the results from the computational setup, and the code is validated against experimental data for a brick rebounding in air and a sphere in a viscous fluid. Different particle shapes are tested, such as cube, ellipsoid, cylinder, pyramid, and a jagged, irregular shape. How the hydrodynamics forces from the viscous fluid vary for each non-spherical particle during rebound, and their scaling is investigated.