Manipulation of ferrofluid droplets using planar coils

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Manipulation of ferrofluid droplets using planar coils

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Title: Manipulation of ferrofluid droplets using planar coils
Author: Nguyen, Nam-Trung; Ng, Kon Meng; Huang, Xiaoyang
Copyright year: 2006
Abstract: In this letter, the authors report a system for magnetic manipulation of ferrofluid droplets and their dynamic behavior. The magnetic field was generated by an array of planar coils, which were fabricated on a double-sided printed circuit board (PCB). The permanent magnetic moment of the ferrofluid droplet was created by the field of a pair of permanent magnets. The motion of the ferrofluid droplet is further aligned in a virtual channel formed by a pair of planar coils. Two other planar coils on the other side of the PCB drive the droplet along this virtual channel. The direction of the droplet motion can be controlled by reversing the electric current in the coils. Based on the experimental results, a larger droplet size, a lower viscosity of the surrounding medium, and a higher electric current will increase the droplet velocity.
Subject: DRNTU::Engineering::Mechanical engineering.
Type: Journal Article
Series/ Journal Title: Applied physics letters
School: School of Mechanical and Aerospace Engineering
Rights: © 2006 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at: DOI: [http://link.aip.org.ezlibproxy1.ntu.edu.sg/link/doi/10.1063/1.2335403].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Version: Published version

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