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力学与实践 ›› 2018, Vol. 40 ›› Issue (3): 259-266.doi: 10.6052/1000-0879-17-334

• 应用研究 • 上一篇    下一篇

电场作用下平面Janus 颗粒受力分析

程则, 彭杰   

  1. 清华大学航天航空学院,北京100084
  • 收稿日期:2017-09-25 修回日期:2017-09-25 出版日期:2018-06-15 发布日期:2018-07-17
  • 作者简介:E-mail: peng-jie@tsinghua.edu.cn

ANALYSIS OF JANUS PARTICLES IN ELECTRIC FIELD

CHENG Ze, PENG Jie   

  1. School of Aerospace, Tsinghua University, Beijing 100084, China
  • Received:2017-09-25 Revised:2017-09-25 Online:2018-06-15 Published:2018-07-17

摘要:

对外加电场作用下无穷大电解质溶液中二维Janus 导电颗粒的受力特性进行研究。在量级分析的基础上,对电解质溶液电渗流动的基本方程组进行解耦,通过引入有限域确保解的存在性,进而得到圆形颗粒周围电场和流场的解析解与半解析解。基于半解析解给出颗粒所受力矩与外加电场方向角之间的变化曲线,从而得到二维Janus 圆形颗粒的平衡姿态及其稳定性特性。在此基础上,通过数值方法给出了电解质溶液中二维Janus 胶囊的受力特性,平衡姿态及其稳定性特性。

关键词:

Janus 颗粒|自组装|二维|电渗流

Abstract:

In this study, the dynamical characteristics of two-dimensional Janus particles in infinite electrolyte solution in the presence of an external electric field are considered. The equations for the electroosmotic flow in the electrolyte solution are established and decoupled on the basis of the order analysis. By introducing the finite computational domain to ensure the existence of the solution, the analytic solution of the electric field and the semi-analytical solution of the flow field around the circular particles are obtained. The relationship between the moments of the particle and the direction of the external electric field is obtained. The equilibrium attitude and the stability characteristics of the two-dimensional Janus particles are thus obtained.

Key words:

Janus particles|self-assembly|two-dimensional|electroosmotic flow

中图分类号: 

  • O351.2