电磁场对带电颗粒分离规律影响的数值模拟研究

颗粒物质是由大量离散的固体颗粒相互作用而组成的复杂物理系统，是地球上存在最多、最为人们所熟悉的物质类型之一。. 目前，颗粒物质的研究进展比较缓慢，对处于电磁场中的带电颗粒的分离规律和力链结构等的特征，相关研究报导很少。在电磁场的作用下，由带电颗粒组成的颗粒物质系统，在进行振动分离时可能会出现不同的结构特征。本项目基于颗粒物质力学和电动力学的基本原理，对处于电磁场中的带电颗粒物质系统建立相应的模型方程，并采用颗粒离散元方法对其振动分离过程进行数值模拟研究，从而系统地分析电磁场的强弱、频率以及颗粒的电量、粒径、磁导率、磁化率等对颗粒的分离规律、结构特征、力链结构等的影响。该项研究既具有重要的实际意义，也是对理论的进一步丰富和发展。

Granular material, which is composed of a large number of discrete particles interacting with each other, is one of the complicated physical systems. They exist widely in the earth. The granular material system is one of the systems that people most familiar with.. At present,the development of research in the field of granular material is not rapid. There are only a few reports on the separation, and the characters of force chain, and so on, of charged particles placed in an electromagnetic field. There maybe exist some different structures and features as the particles separated via vibrating in a container while the system composed of many charged particles placed in an electromagnetic field. The idea of this project is based on the principles of granular material mechanics and electrodynamics. We establish the model equations for the motion of charged particles. The discrete element method will be adopted to simulate the separating process, which is caused by vibrating the container, of the charged particles. We will make detailed analysis on the new structures and features effected by many factors, such as the strength and frequency of the electromagnetic field, the electric quantity each particle carries, ratio of the particles, permeability and magnetisability of the particles, and so on, for the separation of particles. It is meaningful in practice and it will enrich and make development to the theory of nonliear physics to make an in-depth study about this project.