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Induced charge electrophoresis of a conducting cylinder in a nonconducting cylindrical pore and its micromotoring application

Huicheng Feng1, Teck Neng Wong1,*, and Zhizhao Che2

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
  • 2State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

  • *mtnwong@ntu.edu.sg
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Phys. Rev. Fluids 1, 044103 – Published 22 August, 2016

DOI: https://doi.org/10.1103/PhysRevFluids.1.044103

Abstract

Induced charge electrophoresis of a conducting cylinder suspended in a nonconducting cylindrical pore is theoretically analyzed and a micromotor is proposed that utilizes the cylinder rotation. The cylinder velocities are analytically obtained in the Dirichlet and the Neumann boundary conditions of the electric field on the cylindrical pore. The results show that the cylinder not only translates but also rotates when it is eccentric with respect to the cylindrical pore. The influences of a number of parameters on the cylinder velocities are characterized in detail. The cylinder trajectories show that the cylinder approaches and becomes stationary at certain positions within the cylindrical pore. The proposed micromotor is capable of working under a heavy load with a high rotational velocity when the eccentricity is large and the applied electric field is strong.

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Phys. Rev. Fluids 1, 044103– Published 22 August, 2016
  • Received 12 January 2016

©2016 American Physical Society

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