The study of the motion of individual particles in tapered diameter fluidized bed has an important effect on the whole flow field analysis.The single particle motion in tapered diameter liquid-solid fluidized bed were researched by fluent-EDEM coupling simulation.The results showed that different density particles into the sorting area,respectively,with different trajectories,can be separated by density.The axial velocity of the particles with different densities increased first in a short period of time,and then decreased gradually after reaching a certain speed.The simulated results of the s...