Motion of a drop driven by substrate vibrations |
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| Authors: | C Altucci S Amoruso R Bruzzese M Nisoli I Procino G Sansone V Tosa R Velotta C Vozzi J Xia X Wang |
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| Institution: | (1) Laboratoire de Mécanique de Lille, UMR CNRS 8107, Boulevard Paul Langevin, 59655 Villeneuve d’Ascq Cedex, France;(2) Department of Physics & Center for the Study of Complex Systems, University of Michigan, Ann Arbor, MI 48109, USA;(3) Department of Mathematics, University of Bristol, University Walk, BS8 1, TW Bristol, UK |
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| Abstract: | We report an experimental study of liquid drops moving against gravity, when placed on a vertically vibrating inclined plate,
which is partially wet by the drop. Frequency of vibrations ranges from 30 to 200 Hz, and above a threshold in vibration acceleration,
drops experience an upward motion. We attribute this surprising motion to the deformations of the drop, as a consequence of
an up/down symmetry-breaking induced by the presence of the substrate. We relate the direction of motion to contact angle
measurements. |
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