On the elasticity of a liquid shock

On the elasticity of a liquid shock

A drop of low viscosity hitting a solid may bounce, provided that the material is highly hydrophobic. As a model of such a situation, we consider here the case of a very hot solid. Then, as discovered by Leidenfrost, a thin layer of vapour sustains the drop, preventing any contact with the substrate...

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Veröffentlicht in:Journal of fluid mechanics 2006, Vol.554, p.47-66
Hauptverfasser: Biance, Anne-Laure, Chevy, Frédéric, Lagubeau, Guillaume, Clanet, Christophe, Quéré, David
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Engineering Sciences
Fluid mechanics
Fluids mechanics
Mechanics
Physics
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container_end_page 66
container_issue
container_start_page 47
container_title Journal of fluid mechanics
container_volume 554
creator Biance, Anne-Laure
Chevy, Frédéric
Lagubeau, Guillaume
Clanet, Christophe
Quéré, David
description A drop of low viscosity hitting a solid may bounce, provided that the material is highly hydrophobic. As a model of such a situation, we consider here the case of a very hot solid. Then, as discovered by Leidenfrost, a thin layer of vapour sustains the drop, preventing any contact with the substrate. On hitting such a solid, a drop rebounds, and we discuss here the elasticity of the shock. Two very different cases are described: at a large velocity, the weaker the impact velocity, the weaker the elasticity; at a small velocity, a quasi-elastic regime is found. The boundary between the two domains is set by a Weber number, which compares the kinetic and surface energies of the drop, of order unity.
doi_str_mv 10.1017/S0022112006009189
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subjects Engineering Sciences
Fluid mechanics
Fluids mechanics
Mechanics
Physics
title On the elasticity of a liquid shock
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