振动流化床中气泡和颗粒运动特性的数值模拟

Numerical Simulation of Bubble and Particle Motion in Vibrated Fluidized Bed

基于欧拉模型,应用计算流体力学软件Fluent,数值模拟了二维振动流化床的颗粒运动特性,考察了振动流化床内气泡和颗粒速度的分布规律。模拟结果发现:由于振动的作用,床底部与布分板之间会形成间隙,促进了大气泡的形成;随着振动频率、强度的增加,颗粒运动速度增大,流化床内大气泡的形成减少。

Based on the Euler model, numerical simulation of the particle movement characteristics of two dimensional vibrating fluidized beds, by computational fluid dynamics software Fluent, investigated the particle movement and bubbles in the vibration fluidized bed. Simulation results showed that; due to the vibration, between the bed bottom and distribution board will form a gap; promote the formation of big bubbles; with the increase of vibration frequency and intensity, the particle movement speed will increases, the formation of large bubbles in the ftuidized bed reduction.