Study on flow characteristics of binary-particle liquid-solid fluidized bed of sinusoidal pulsating liquid velocity

In this work, the flow characteristics of binary particles with different densities and sizes in a liquid-solid fluidized bed with sinusoidal pulsating liquid velocity are numerically simulated using the Euler-Euler-Euler multiphase flow model. The simulation data are compared with the experimental results obtained from a self- built experimental system to validate the model's accuracy. The main research findings are as follows: (1) The average deviation of the axial solid holdup of binary particles decreases with the increasing pulsation period, while the relative velocity between phases increases with the increase in pulsation period. (2) The deviation of axial solid holdup of binary particles reaches its lowest value when the pulsation amplitude is nearby 1 m s- 1, and the relative velocity between phases increases with the increase in pulsation amplitude. (3) Regression equations for the relative velocities between liquid and solid phases and the average deviation of axial solid holdup are derived.