Numerical Simulation of Single Microparticle Trajectory in an Electrodynamic Balance  

作　　者：冯昭华 朱家骅 杨雪峰 夏素兰 关国强 Davis E.J. 

机构地区：[1]School of Chemical Engineering, Sichuan University, Chengdu 610065, China [2]Department of Chemical Engineering, University of Washington, Seattle, Washington 98195-1750, USAy introducing Oseen's formula to describe the viscous drag force, a more complete motion equation for a charged microparticle levitated in an electrodynamic balance (EDB) has been put forward and solved numerically by the classic Runge-Kutta method in this paper. The theoretical results have firstly demonstrated the existence of the particle oscillations and their characteristics, especially of the springpoint oscillation at large amplitude. And through the comparisons of theoretical and experimental trajectories, the adopted motion equation has proved to be able to rigorously describe the particle motion in non-Stokes region-the shape of trajectory and frequency characteristics are fairly consistent and the deviations of amplitude can usually be less than 10%.

出　　处：《Chinese Journal of Chemical Engineering》2004年第3期444-447,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 29876022) ; the Doctoral Foundation of Education Ministry of China (No. 20010610027).

摘　　要：By introducing Oseen's formula to describe the viscous drag force, a more complete motion equation for a charged microparticle levitated in an electrodynamic balance (EDB) has been put forward and solved numerically by the classic Runge-Kutta method in this paper. The theoretical results have firstly demonstrated the existence of the particle oscillations and their characteristics, especially of the springpoint oscillation at large amplitude. And through the comparisons of theoretical and experimental trajectories, the adopted motion equation has proved to be able to rigorously describe the particle motion in non-Stokes region-the shape of trajectory and frequency characteristics are fairly consistent and the deviations of amplitude can usually be less than 10%.By introducing Oseen's formula to describe the viscous drag force, a more complete motion equation for a charged microparticle levitated in an electrodynamic balance (EDB) has been put forward and solved numerically by the classic Runge-Kutta method in this paper. The theoretical results have firstly demonstrated the existence of the particle oscillations and their characteristics, especially of the springpoint oscillation at large amplitude .And through the comparisons of theoretical and experimental trajectories, the adopted motion equation has proved to be able to rigorously describe the particle motion in non-Stokes region--the shape of trajectory and frequencycharacteristics are fairlv consistent and the deviations of amnliturla c^n n^llzll^r ho lo~ th^n

关 键 词：electrodynamic balance microparticle oscillation TRAJECTORY numerical simulation 

分 类 号：O482[理学—固体物理]