Lattice Boltzmann Simulations to Determine Forces Acting on Non-Spherical Particles

摘要

The drag, lift and moment coefficient of differently shaped single particles with respect to the angle of incidence and to the particle Reynolds number under different conditions were determined. For this purpose simulations of the flow around these particles were performed using the three-dimensional Lattice Boltzmann method. The first case studied was a fixed particle in a plug flow, the second case a rotating particle in a plug flow to determine the Magnus lift force and the third case a fixed particle in a linear shear flow to determine the Saffman lift force. In the first case six particle shapes were considered, which are two spheroids, two cuboids and two cylinders with an axis ratio of 1 and 1.5, respectively. In the second and third case, only the sphere was considered. The particle Reynolds number was varied between 0.3 and 480.