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Grooves Accelerate Dew Shedding

Pierre-Brice Bintein, Henri Lhuissier, Anne Mongruel, Laurent Royon, and Daniel Beysens
Phys. Rev. Lett. 122, 098005 – Published 8 March 2019
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Abstract

Gravity-driven drainage of small volumes of condensates, such as natural dew, is a challenge because small drops usually remain pinned to inclined surfaces. We report that submillimetric grooves substantially reduce dew retention by modifying the repartition of liquid: Because of a long-range coalescence mechanism mediated by grooves imbibition, the growth and shedding of large drops are accelerated. Such findings can be applied to increase the passive harvesting of dew as well as to accelerate the drainage of other condensates.

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  • Received 15 July 2018
  • Revised 12 November 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.098005

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Fluid DynamicsPolymers & Soft Matter

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Key Image

Video—A Groovy Way to Harvest Dew

Published 8 March 2019

Dew condensing on an inclined, grooved surface rapidly forms large drops that roll quickly to the bottom for collection.

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Authors & Affiliations

Pierre-Brice Bintein1, Henri Lhuissier2,3, Anne Mongruel3, Laurent Royon1, and Daniel Beysens3,*

  • 1University Paris Diderot, CNRS, Sorbonne Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain, 75013 Paris, France
  • 2Aix Marseille Univ, CNRS, IUSTI, 13453 Marseille, France
  • 3Physique et Mécanique des Milieux Hétérogènes, CNRS, ESPCI, PSL Research University, Sorbonne Université, Sorbonne Paris Cité, 75005 Paris, France

  • *daniel.beysens@espci.fr

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Issue

Vol. 122, Iss. 9 — 8 March 2019

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