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Surfing on a herringbone

Dan Soto, Guillaume Lagubeau, Christophe Clanet, and David Quéré

  • Physique et Mécanique des Milieux Hétérogènes, UMR No. 7636 du CNRS, ESPCI, 75005 Paris, France and LadHyX, UMR No. 7646 du CNRS, École Polytechnique, 91128 Palaiseau Cedex, France

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Phys. Rev. Fluids 1, 013902 – Published 12 May, 2016

DOI: https://doi.org/10.1103/PhysRevFluids.1.013902

Abstract

Evaporation of a liquid on a hot solid can be exploited to induce both levitation and self-propulsion if the vapor flow under the liquid is made directional. Here we propose to force an anisotropic flow of vapor with a herringbone pattern at a solid surface. Liquids are found to self-propel on such hot materials, drawn by the underlying flow of vapor. The simplicity of the geometry allows us to predict the direction of vapor flow rectification, to quantitatively model the propulsion, and to discuss how the pattern must be designed to optimize both driving force and drop velocity.

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References (22)

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Phys. Rev. Fluids 1, 013902– Published 12 May, 2016
  • Received 12 January 2016

©2016 American Physical Society

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