Deformation and motion of a charged conducting drop in a dielectric liquid under a nonuniform electric field

被引：35

作者：

Kim, J. G. ^{[1
]}

Im, D. J. ^{[1
]}

Jung, Y. M. ^{[1
]}

Kang, I. S. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang, South Korea

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 310卷 / 02期

关键词：

charged conducting drop; drop deformation; Coulombic force; dielectric force;

D O I：

10.1016/j.jcis.2007.02.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As a tool for transporting a drop inside another fluid, a charged conducting drop driven by Coulombic force is considered. Specifically, deformation and motion of a charged conducting drop under nonuniform electric fields are studied using the perturbation method. For simplicity in analysis, the applied electric field is assumed to be expressed as the sum of a uniform field and a linear field and the flow is assumed to be in the Stokes flow range. The deformed drop shape due to electrical stress is computed to the first order of the electrical Weber number (W). Then the electric force and the hydrodynamic drag are computed to derive the formula of the translation velocity, which is valid up to O(W). Several important results have also been obtained for the effect of drop deformation on the electric and hydrodynamic forces exerted on the drop. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：599 / 606

页数：8

共 7 条

[1] Rhythmic motion of a droplet under a dc electric field [J].