Journal of Fluid Mechanics



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Drops on a conical wire


ÉLISE LORENCEAU a1 and DAVID QUÉRÉ a1
a1 Laboratoire de Physique de la Matière Condensée, UMR 7125 du CNRS, Collège de France, 75231 Paris Cedex 05, France

Article author query
lorenceau e   [Google Scholar] 
quere d   [Google Scholar] 
 

Abstract

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.

(Received June 3 2003)
(Revised December 31 2003)



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