dorsal/arxiv
View SchemaRetraction dynamics of aquous drops upon impact on nonwetting surfaces
| Authors | Denis Bartolo, Christophe Josserand, Daniel Bonn |
|---|---|
| Categories | |
| ArXiv ID | physics/0509133 |
| URL | https://arxiv.org/abs/physics/0509133 |
| DOI | 10.1017/S0022112005007184 |
Abstract
We study the impact and subsequent retraction dynamics of liquid droplets upon high-speed impact on hydrophobic surfaces. Performing extensive experiments, we show that the drop retraction rate is a material constant and does not depend on the impact velocity. We show that when increasing the Ohnesorge number, $\Oh=\eta/\sqrt{\rho R_{\rm I} \gamma}$, the retraction, i.e. dewetting, dynamics crosses over from a capillaro-inertial regime to a capillaro-viscous regime. We rationalize the experimental observations by a simple but robust semi-quantitative model for the solid-liquid contact line dynamics inspired by the standard theories for thin film dewetting.
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"abstract": "We study the impact and subsequent retraction dynamics of liquid droplets\nupon high-speed impact on hydrophobic surfaces. Performing extensive\nexperiments, we show that the drop retraction rate is a material constant and\ndoes not depend on the impact velocity. We show that when increasing the\nOhnesorge number, $\\Oh=\\eta/\\sqrt{\\rho R_{\\rm I} \\gamma}$, the retraction, i.e.\ndewetting, dynamics crosses over from a capillaro-inertial regime to a\ncapillaro-viscous regime. We rationalize the experimental observations by a\nsimple but robust semi-quantitative model for the solid-liquid contact line\ndynamics inspired by the standard theories for thin film dewetting.",
"arxiv_id": "physics/0509133",
"authors": [
"Denis Bartolo",
"Christophe Josserand",
"Daniel Bonn"
],
"categories": [
"physics.flu-dyn"
],
"doi": "10.1017/S0022112005007184",
"title": "Retraction dynamics of aquous drops upon impact on nonwetting surfaces",
"url": "https://arxiv.org/abs/physics/0509133"
},
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