Droplet hurdles race

Water is extremely mobile on non-wetting surfaces, on which it glides at high velocities. We discuss how a few indentations placed on the surface markedly slow down drops forced to hit and jump above these hurdles. The corresponding “friction” is characterized and shown to be inertial in nature, whi...

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Bibliographic Details
Published in:Applied physics letters 2021-04, Vol.118 (17)
Main Authors: de Maleprade, Hélène, Bendimerad, Rafid, Clanet, Christophe, Quéré, David
Format: Article
Language:English
Subjects:
Applied physics
Physics
Wetting
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Summary:Water is extremely mobile on non-wetting surfaces, on which it glides at high velocities. We discuss how a few indentations placed on the surface markedly slow down drops forced to hit and jump above these hurdles. The corresponding “friction” is characterized and shown to be inertial in nature, which we interpret as the result of the successive soft shocks of the drops against obstacles.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0043908