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Shapes of rolling liquid drops

Published online by Cambridge University Press:  23 July 2004

PASCALE AUSSILLOUS  and
DAVID QUÉRÉ
PASCALE AUSSILLOUS
Affiliation:
Institute of Theoretical Geophysics, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, CMS, Wilberforce road, Cambridge CB3 0WA, UK 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 describe here liquid drops in rotation, and first classify the different shapes possible. Then, we study the behaviour of liquid marbles, which are droplets coated with hydrophobic grains, running down inclines. Because these marbles roll as they move, this device allows us to achieve revolving drops. We report the different forms generated during the descent, and quantify their size by way of scaling arguments. We finally focus on the transformations which may occur between different drop shapes.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 512 , 10 August 2004 , pp. 133 - 151
Copyright
© 2004 Cambridge University Press