The Geometry of the Vapor Layer Under a Leidenfrost Drop

In the Leidenfrost effect, liquid drops deposited on a hot surface levitate on a thin vapor cushion fed by evaporation of the liquid. This vapor layer forms a concave depression in the drop interface. Using laser-light interference coupled to high-speed imaging, we measured the radius, curvature, an...

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Veröffentlicht in:arXiv.org 2012-06
Hauptverfasser: Burton, J C, Sharpe, A L, R C A van der Veen, Franco, A, Nagel, S R
Format: Artikel
Sprache:eng
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Zusammenfassung:In the Leidenfrost effect, liquid drops deposited on a hot surface levitate on a thin vapor cushion fed by evaporation of the liquid. This vapor layer forms a concave depression in the drop interface. Using laser-light interference coupled to high-speed imaging, we measured the radius, curvature, and height of the vapor pocket, as well as non-axisymmetric fluctuations of the interface for water drops at different temperatures. The geometry of the vapor pocket depends primarily on the drop size and not on the substrate temperature.
ISSN:2331-8422
DOI:10.48550/arxiv.1202.2157