Self-propulsion of a spherical electric or magnetic microbot in a polar viscous fluid

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
B U Felderhof

Abstract

The self-propulsion of a sphere immersed in a polar liquid or ferrofluid is studied on the basis of ferrohydrodynamics. In the electrical case an oscillating charge density located inside the sphere generates an electrical field that polarizes the fluid. The lag of polarization with respect to the electrical field due to relaxation generates a time-independent electrical torque density acting on the fluid, causing it to move. The resulting propulsion velocity of the sphere is calculated in perturbation theory to second order in powers of the charge density.

References

Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·M I Shliomis
Mar 5, 2004·Physical Review Letters·Martin Z Bazant, Todd M Squires
Nov 13, 2009·Physical Review Letters·Douwe Jan BonthuisRoland R Netz
Oct 19, 2010·The Journal of Chemical Physics·J S HansenPeter J Daivis
Feb 28, 2006·Nanotechnology·Leidong Mao, Hur Koser
Jul 7, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·B U Felderhof
Apr 26, 2013·The Journal of Chemical Physics·Sergio De LucaPeter J Daivis

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