少量の水分を添加した粒子流れの数値シミュレーション : 遠心転動造粒機内の粒子流動

抄録

A numerical simulation of particle flows in a centrifugal tumbling granulator was made by using DEM (Discrete Element method). Granulation process is driven by adding binding liluid. It is well known that a small amount of liquid has a significant effect on the motion of particles, so that it is important to model the effect of liquid bridge. We propose a model for the inter-particle force due to a liquid bridge which is based on the theory of liquid bridge. The present model is applied to the flow in the granulater. On the other hand, an experiment is made for the comparison. Particle velocities on the surface of moving particle bed is measured by using PTV technique. Tendency of particle velocities predicted by the present simulation agreed well with the experiments.