Corson, L.T., Tsakonas, C., Duffy, B.R., Mottram, N.J. , Brown, C.V. and Wilson, S.K. (2016) Electro-Manipulation of Droplets for Microfluidic Applications. In: ECMI 2014, Taormina, Italy, 9-13 Jun 2014, pp. 1073-1080. ISBN 9783319234120 (doi: 10.1007/978-3-319-23413-7)
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Abstract
There is a growing technology-driven interest in using external influences to move or shape small quantities of liquids, a process that is referred to as microfluidic actuation. The use of electrical, rather than mechanical, forces to achieve this actuation is convenient, because the resultant devices contain no moving parts. In this work we consider a sessile drop of an incompressible liquid with a high conductivity resting on the lower substrate inside a parallel-plate capacitor subjected to a relatively low frequency A.C. field. With the application of an electric field the drop deforms into a new static shape where the apex of the drop rises towards the upper electrode in order to balance the Maxwell electric stresses, surface tension and hydrostatic pressure on the interface. From experimental, numerical and asymptotic approaches we determine a predictive equation for the deformation as a function of initial contact angle and drop width, surface tension and applied voltage.
Item Type: | Conference Proceedings |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Mottram, Professor Nigel |
Authors: | Corson, L.T., Tsakonas, C., Duffy, B.R., Mottram, N.J., Brown, C.V., and Wilson, S.K. |
College/School: | College of Science and Engineering > School of Mathematics and Statistics > Mathematics |
ISSN: | 1612-3956 |
ISBN: | 9783319234120 |
Published Online: | 05 September 2017 |
Copyright Holders: | Copyright © 2016 Springer International Publishing AG |
First Published: | First published in Progress in Industrial Mathematics at ECMI 2014: 1073-1080 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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