DEM Analysis on Flow Patterns of Geldart's Group A Particles in Fluidized Bed

Abstract

A discrete particle model for flows of Geldart's Group A particles is investigated. It is known that Group A particles have a characteristic flow regime (homogeneous regime) in fluidized beds. It is found that the present simulation predicts the homogeneous regime and the hysteresis behavior in the bed pressure drop. By analyzing the stress chain in the particles bed, it is shown that the hysteresis behavior is caused by a change in the stress distribution in the particles bed.