A numerical study of fluidization behavior of Geldart A particles using a discrete particle model

摘要: This paper reports on a numerical study of fluidization behavior Geldart A particles by use 2D soft-sphere discrete particle model (DPM). Some typical features, including the homogeneous expansion, gross circulation in absence bubbles, and fast can be clearly displayed if interparticle van der Waals forces are relatively weak. An anisotropy velocity fluctuation is found both regime bubbling regime. The shown to represent transition phase resulting from competition three kinds basic interactions: fluid?particle interaction, particle?particle collisions (and particle?wall collisions) forces. In regime, however, effect vanishes interaction becomes dominant factor determining particles. also evidenced comparisons particulate pressure with other theoretical experimental results.