摘要
以FLUENT软件为计算工具,采用Euler-Lagrange方法模拟高梯度磁场中气-固两相流动,气相用标准k-ε湍流模型描述,综合考虑颗粒受力,并用颗粒轨道模型对颗粒的运动进行了数值计算,结果表明:对亚观尺度的磁性微粒,磁场作用力和流体曳力对颗粒的运动起主要作用;颗粒起始位置越靠近磁介质,颗粒就越容易被捕捉;当磁性微粒的直径在5～40μm范围内时,粒径越大,粒子被捕捉的可能性就越大;较低的气流速度有利于颗粒的捕捉。
In this paper,with the help of FLUENT software,simulation of the two-phase flow in a high gradient magnetic field is conducted and the standard turbulence model for gas flow is described using the Euler-Lagrange method. With the consideration of the particles load-carrying and the simulation results,we conclude that: The sub-scale magnetic particles,magnetic force and fluid drag force play a major role in the movement of the particles; the closer the starting position of the particles,the easier for them to be caught; When the magnetic particle diameter of 10 ~ 40 range,the larger the size of the particles,the higher the likelihood to be captured is and lower flow rate is conducive to capture particles.
出处
《选煤技术》
CAS
北大核心
2010年第2期20-23,共4页
Coal Preparation Technology
基金
河南省重点科技攻关资助项目(072102290002)
河南理工大学青年基金项目(Q2009-28)
关键词
高梯度磁场
磁介质
模型
磁性微粒
运动轨迹
数值模拟
high gradient magnetic field
magnetic separation
numerical simulation
movement trace
