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Grooves Accelerate Dew Shedding

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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Submitted on : Tuesday, April 9, 2019 - 1:37:04 PM
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2019 Bintein Lhuissier Beysens...
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Pierre-Brice Bintein, Henri Lhuissier, Anne Mongruel, Laurent Royon, Daniel Beysens. Grooves Accelerate Dew Shedding. Physical Review Letters, American Physical Society, 2019, 122 (9), ⟨10.1103/PhysRevLett.122.098005⟩. ⟨hal-02093995⟩



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