Volume 62, Number 2, April 2003
|Page(s)||237 - 243|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 April 2003|
Water spring: A model for bouncing drops
Laboratoire de Physique de la Matière Condensée, UMR 7125
du CNRS Collège de France - 75231 Paris Cedex 05, France
2 Department of Physics, Graduate School of Humanities and Sciences Ochanomizu University - 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
3 Institut de Recherche sur les Phénomènes Hors Equilibre, UMR 6594 du CNRS BP 146, 13384 Marseille Cedex, France
Accepted: 19 February 2003
It has been shown that a water drop can bounce persistently, when thrown on a super-hydrophobic substrate. We present here scaling arguments which allow us to predict the maximal deformation and the contact time of the drop. This approach is completed by a model describing the flow inside the drop, and by original experimental data.
PACS: 68.03.Cd – Surface tension and related phenomena / 68.08.Bc – Wetting / 47.85.Dh – Hydrodynamics, hydraulics, hydrostatics
© EDP Sciences, 2003
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