Geometry of the Vapor Layer Under a Leidenfrost Drop

J. C. Burton, A. L. Sharpe, R. C. A. van der Veen, A. Franco, and S. R. Nagel
Phys. Rev. Lett. 109, 074301 – Published 16 August 2012

Abstract

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 nonaxisymmetric 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.

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  • Received 9 February 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.074301

© 2012 American Physical Society

Authors & Affiliations

J. C. Burton*, A. L. Sharpe, R. C. A. van der Veen, A. Franco, and S. R. Nagel

  • James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA

  • *jcburton@uchicago.edu

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Issue

Vol. 109, Iss. 7 — 17 August 2012

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