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Electric current-driven migration of electrically neutral particles in liquids

Zhang, Xinfang and Qin, Rongshan (2014). Electric current-driven migration of electrically neutral particles in liquids. Applied Physics Letters, 104(11), article no. 114106.

DOI (Digital Object Identifier) Link: https://doi.org/10.1063/1.4869465
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Abstract

We design and experimentally demonstrate a migration of electrically neutral particles in liquids driven by electric current according to the discrepancies of their electrical conductivities. A force from electric current to electrically neutral particles has been identified to drive the particles toward the lateral surface from the centre of suspension via three distinguishable zones, namely, pushing, trapping, and expelling zones. The driving force can overtake gravity in practical cases. The property of the force is found neither similar to that of the force in electromagnetophoresis nor similar to that of the electromigration force in terms of direction and magnitude. An expression for the force at the pushing zone has been developed based on the numerical calculation of the thermodynamics of suspension fluids. The excellent agreement between numerical calculations and experimental data demonstrates that our calculation provides fundamental and predictive insight into particles separation from the liquids. Therefore, it is possible to use the force in many engineering applications such as separation of particles according to the differences of their electrical conductivities.

Item Type: Journal Item
Copyright Holders: 2014 AIP Publishing LLC
ISSN: 1077-3118
Extra Information: 5 pp.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41898
Depositing User: Xinfang Zhang
Date Deposited: 23 Jan 2015 12:16
Last Modified: 29 Nov 2016 10:40
URI: http://oro.open.ac.uk/id/eprint/41898
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