修正磁化模型的多组分铁磁性颗粒运动研究  

STUDY ON MOTION OF MULTI-COMPONENT FERROMAGNETIC PARTICLES WITH MODIFIED MAGNETIZATION MODEL

作　　者：陈巨辉[1] 安然 舒崚峰 李丹[1] 刘晓刚 毛颖 陈纪元 高浩铭 吕文生 孟凡奇 Chen Juhui;An Ran;Shu Lingfeng;Li Dan;Liu Xiaogang;Mao Ying;Chen Jiyuan;Gao Haoming;Lyu Wensheng;Meng Fanqi(School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China;Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China;AECC Harbin Dongan Engine Corporation Limited,Harbin 150066,China)

机构地区：[1]哈尔滨理工大学机械动力工程学院,哈尔滨150080 [2]中国电建集团华东勘测设计研究院有限公司,杭州311122 [3]中国航发哈尔滨东安发动机有限公司,哈尔滨150066

出　　处：《力学学报》2024年第3期740-750,共11页Chinese Journal of Theoretical and Applied Mechanics

基　　金：黑龙江省重大科技专项(2019ZX03A02);国家自然科学基金(5210110314)资助项目。

摘　　要：铁磁性颗粒因具有铁磁性被广泛应用于化工环保、生化工程和能源等各个领域,磁场具有的穿透性质,对于采用铁磁性颗粒的系统,可通过改变磁场控制系统内颗粒的运动状态.文章基于传统的磁化模型,采用相对参考系转换方法,提出了适用范围更广的修正P-E磁化模型,可以计算铁磁性颗粒在任意方向磁场作用下所受磁化力.通过有限体积法(FVM)与离散单元法(DEM)耦合进行数值模拟,验证了修正P-E磁化模型的精确性,并模拟多组分颗粒在磁场中的运动,对比了铁磁性颗粒与惰性颗粒在不同配比及不同磁场条件下的运动特性,对颗粒分布、颗粒速度矢量和颗粒总能量变化3个方面进行分析.结果表明:在多组分颗粒系统中,铁磁性颗粒依旧保持成链特性,但成链速度与长度降低;随着铁磁性颗粒占比提高,铁磁性颗粒初始能量增大,聚链数量与成链长度将有所增加,约束惰性颗粒能力增强;此外,施加水平与竖直方向磁场时,多组分颗粒系统达到稳定速度最快,可以通过增大铁磁性颗粒占比有效提升稳定速度,使系统更快趋于稳定;而施加含有倾角的磁场时,随着铁磁性颗粒占比升高,铁磁性颗粒达到稳定状态需要的时间逐渐降低,较难通过改变铁磁性颗粒占比缩短稳定所需时间.Ferromagnetic particles are widely used in chemical environmental protection,biochemical engineering,energy and other fields because of their ferromagnetism.The penetrating nature of the magnetic field,for systems employing ferromagnetic particles,can be controlled by changing the magnetic field to control the motion of the particles within the system.In this paper,based on the traditional magnetization model,a modified P-E magnetization model with a wider range of applicability is proposed by using the relative reference system conversion method,which can calculate the magnetization force on ferromagnetic particles under the action of a magnetic field in any direction.Numerical simulations by coupling the finite volume method(FVM)with the discrete element method(DEM)to verify the accuracy of the modified P-E magnetization model and to simulate the motion of multicomponent particles in a magnetic field.The motion characteristics of ferromagnetic particles and inert particles in different ratios and magnetic fields were compared.The particle distribution,particle velocity vector and particle total energy were analyzed.The results show that in the multi-component particle system,the ferromagnetic particles still maintain the chain formation characteristics,but the chain formation speed and length decrease.The initial energy of ferromagnetic particles increases as the proportion of ferromagnetic particles grows,as does the number of polymer chains and the length of chain creation,and the ability to limit inert particles.Furthermore,when both horizontal and vertical magnetic fields are applied,the multi-component particle system achieves the fastest rate of stability.The rate of stabilization can be efficiently increased by increasing the number of ferromagnetic particles,causing the system to stabilize faster.When the magnetic field containing inclination Angle is applied,the time required for ferromagnetic particles to reach the stable state gradually decreases with the increase of the proportion of ferromagnetic p

关 键 词：多组分颗粒 铁磁性颗粒 FVM-DEM 修正P-E磁化模型 聚链 

分 类 号：O359[理学—流体力学]