Giga-scale DEM Simulation by a Novel Similar Particle Assembly Model

Abstract

A novel method for giga-scale DEM simulation was derived. The method is based on the motion equation for particles keeping the local particle assembly similar. The motion of multiple particles whose diameter, density and chemical composition are the same is represented by one particle called a representative particle. This method can be accordingly called'a representative particle model'. A representative particle occupies the same volume as the one of the represented particles and has the same density and chemical composition. This model can be applied even for cohesive particles and non-uniform size particles. The present model was validated by carrying out numerical simulations for particles of 2 densities. From the comparisons between the results with and without the model, the effectiveness of the model was confirmed.