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One-dimensional actuation of a ferrofluid droplet by planar microcoils

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One-dimensional actuation of a ferrofluid droplet by planar microcoils

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Title: One-dimensional actuation of a ferrofluid droplet by planar microcoils
Author: Beyzavi, Ali; Nguyen, Nam-Trung
Copyright year: 2009
Abstract: This paper discusses the simulation of a device for actuation of a ferrofluid droplet using planar microcoils. The device with two pairs of planar microcoils was designed and fabricated on a double-sided printed circuit board (PCB). Each pair is placed on each side of the PCB. The coils on the bottom actuate the droplet along the line connecting their centres. The coils on the top create a virtual channel to confine the motion of the droplet along a straight line. The paper first formulates the model of the magnetic field of the coils. With the modelled magnetic field, the corresponding forces acting on the droplet were calculated. The equation of the motion of a ferrofluid droplet immersed in silicone oil is solved numerically. The influence of different parameters such as driving current, droplet diameter and viscosity of the carrier fluid is investigated. Theoretical and experimental results agree well quantitatively and qualitatively. Both theoretical and experimental results show that a higher magnetic field, a lower oil viscosity and a bigger droplet size will increase the peak velocity of the droplet.
Subject: DRNTU::Engineering::Mechanical engineering
Type: Journal Article
Series/ Journal Title: Journal of physics D: applied physics
School: School of Mechanical and Aerospace Engineering
Rights: © 2009 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Physics D-Applied Physics, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: DOI: [http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1088/0022-3727/42/1/015004]
Version: Accepted version

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