Colloidal particle electrorotation in a nonuniform electric field

被引：10

作者：

Hu, Yi ^{[1
]}

Vlahovska, Petia M. ^{[1
]}

Miksis, Michael J. ^{[1
]}

机构：

[1] Northwestern Univ, Engn Sci & Appl Math, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW E | 2018年 / 97卷 / 01期

基金：

美国国家科学基金会;

关键词：

MICRO-ROTORS; ROTATION; SPHERES; POPULATIONS; SUSPENSIONS; VISCOSITY; EMERGENCE; DYNAMICS;

D O I：

10.1103/PhysRevE.97.013111

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A model to study the dynamics of colloidal particles in nonuniform electric fields is proposed. For an isolated sphere, the conditions and threshold for sustained (Quincke) rotation in a linear direct current (dc) field are determined. Particle dynamics becomes more complex with increasing electric field strength, changing from steady spinning around the particle center to time-dependent orbiting motion around the minimum field location. Pairs of particles exhibit intricate trajectories, which are a combination of translation, due to dielectrophoresis, and rotation, due to the Quincke effect. Our model provides a basis to study the collective dynamics of many particles in a general electric field.

引用

页数：14

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