Study of Geldart's Group A behaviour using the discrete element method simulation

Homogeneous fluidization is observed for a significant range of gas velocity and minimum bubbling velocity is found to be greater than minimum fluidization velocity, even when there is no interparticle force. This is evidence of true Group A behaviour in the absence of interparticle cohesive force. Smaller particles, further from the boundary between Groups A and B, showed more expansion before the start of bubbling and a higher ratio of minimum bubbling velocity to minimum fluidization velocity.