Maximal air bubble entrainment at liquid drop impact

At impact of a liquid drop on a solid surface an air bubble can be entrapped. Here we show that two competing effects minimize the (relative) size of this entrained air bubble: For large drop impact velocity and large droplets the inertia of the liquid flattens the entrained bubble, whereas for smal...

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Bibliographic Details
Published inarXiv.org
Main Authors Bouwhuis, Wilco, Roeland C A van der Veen, Tran, Tuan, Keij, Diederik L, Winkels, Koen G, Peters, Ivo R, Devaraj van der Meer, Sun, Chao, Snoeijer, Jacco H, Lohse, Detlef
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.05.2012
Subjects
Air entrainment
Bubbles
Droplets
Drops (liquids)
Entrapment
Impact velocity
Physics - Fluid Dynamics
Physics - Pattern Formation and Solitons
Solid surfaces
Submerging
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Summary:At impact of a liquid drop on a solid surface an air bubble can be entrapped. Here we show that two competing effects minimize the (relative) size of this entrained air bubble: For large drop impact velocity and large droplets the inertia of the liquid flattens the entrained bubble, whereas for small impact velocity and small droplets capillary forces minimize the entrained bubble. However, we demonstrate experimentally, theoretically, and numerically that in between there is an optimum, leading to maximal air bubble entrapment. Our results have a strong bearing on various applications in printing technology, microelectronics, immersion lithography, diagnostics, or agriculture.
ISSN:2331-8422
DOI:10.48550/arxiv.1205.4761