Electric field induced deformation of hemispherical sessile droplets of ionic liquid |
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| Affiliation: | 1. School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK;2. Department of Mathematics and Statistics, University of Strathclyde, 26 Richmond Street, Glasgow G1 1XH, UK;1. IRAMIS, LIONS, UMR NIMBE CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France;2. Institute of Solid State Physics, Russian Academy of Sciences, 2 Academician Ossipyan Str., Chernogolovka, Moscow District 142432, Russia;1. Department of Electrical and Computer Engineering, Western University, London, ON, Canada N6A 5B9;2. Yamagata University, Jonan, Yonezawa 92-8510, Japan;1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China;2. School of Materials Science and Engineering of UPC, China University of Petroleum (East China), Qingdao 266580, China;3. State Key Laboratory of Heavy Oil, China University of Petroleum (East China), Qingdao 266580, China;1. College of Pipeline & Civil Engineering, China University of Petroleum, Qingdao 266555, Shandong, China;2. Sinopec Petroleum Engineering Corporation, Dongying 257026, Shandong, China |
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| Abstract: | Sessile droplets of an ionic liquid with contact angles close to 90° were subjected to an electric field E = V/w inside a capacitor with plate separation w and potential difference V. For small field induced deformations of the droplet shape the change in maximum droplet height, Δh = h(E) – h(0), was found to be virtually independent of the plate separation provided that w > 3h(0). In this regime a scaling law obtains Δh α E2r2, where r is the constant droplet radius, in agreement with the asymptotic predictions of Basaran and Scriven (J. Coll. Int. Sci. 140, 10, 1990). |
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| Keywords: | Wetting Contact angle Ionic liquid Electrostatic field Parallel plate capacitor |
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