Deformation of a nearly hemispherical conducting drop due to an electric field: Theory and experiment
Deformation of a nearly hemispherical conducting drop due to an electric field: Theory and experiment
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DOI：
10.1063/1.4903223
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发表时间：
2014-12-01
影响因子：
4.6
通讯作者：
Wilson, S. K.
中科院分区：
文献类型：
--
作者：
Corson, L. T.;Tsakonas, C.;Wilson, S. K.
We consider, both theoretically and experimentally, the deformation due to an electric field of a pinned nearly hemispherical static sessile drop of an ionic fluid with a high conductivity resting on the lower substrate of a parallel-plate capacitor. Using both numerical and asymptotic approaches, we find solutions to the coupled electrostatic and augmented Young-Laplace equations which agree very well with the experimental results. Our asymptotic solution for the drop interface extends previous work in two ways, namely, to drops that have zero-field contact angles that are not exactly pi/2 and to higher order in the applied electric field, and provides useful predictive equations for the changes in the height, contact angle, and pressure as functions of the zero-field contact angle, drop radius, surface tension, and applied electric field. The asymptotic solution requires some numerical computations, and so a surprisingly accurate approximate analytical asymptotic solution is also obtained. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
