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Drops on a conical wire

Published online by Cambridge University Press:  23 June 2004

ÉLISE LORENCEAU  and
DAVID QUÉRÉ
ÉLISE LORENCEAU
Affiliation:
Laboratoire de Physique de la Matière Condensée, UMR 7125 du CNRS, Collège de France, 75231 Paris Cedex 05, France
DAVID QUÉRÉ
Affiliation:
Laboratoire de Physique de la Matière Condensée, UMR 7125 du CNRS, Collège de France, 75231 Paris Cedex 05, France
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Abstract

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We study experimentally the behaviour of a drop deposited on a conical fibre. It is shown that for wetting liquids, such a drop spontaneously moves towards the region of lower curvature. The driving force is measured and shown to be a gradient of Laplace pressure, which allows us to characterize the dynamics of these self-propelling drops. We conclude by discussing the efficiency of this device for drying a solid initially coated with a liquid film.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 510 , 10 July 2004 , pp. 29 - 45
Copyright
© 2004 Cambridge University Press