Development of Advanced Representative Particle Model-Application of DEM Simulation to Large-scale Powder Systems-

Some investigators have proposed models for large-scale Discrete Element Method (DEM) simulations since the numder of particles is restricted by the limit of computer memories In these models the particle-to-particle contact force was not evaluated accurately. This is due to the fact that the models were developed for fluidized beds where the fluid drag force is dominant. In the present study, Advanced Representative Particle Model (ARPM) is developed to evaluate the contact force accurately in the large-scale DEM simulations. In the ARPM, the original small-size particles are represented by a large-size ARPM particle. The translational and rotational energies are the same for the ARPM particles and the original small-size particles in the interaction. In this study, the ARPM is verfied by numerical examplas. It is clarified that the behavior of the original small-size particles is successfully simulated by using the large-size ARPM particles.