Coupling of granular media and fluid flow solved by the finite pointset method

In this paper we present strategies of simulating particles with mass like stones or dust in flow problems. The focus will be on the modelling of the particles, e.g. particle-particle and particle-wall collisions, and the coupling of the fluid phase to the particles. The latter means the interpolation of the fluid or gas phase data, provided by the finite pointset method, and the granular phase. Note that there is a large difference in density of the point set needed for the fluid phase and the one describing the granular phase. Therefore, an efficient interpolation algorithm is shown in order to decrease the numerical effort. Moreover, the modelling of an inner energy, modelling stress in the particles, is described which also allows a breakage of particles if the stress becomes to large.