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Issue 26, 2018
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Capillary descent

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A superhydrophobic capillary tube immersed in water and brought in contact with the bath surface will be invaded by air, owing to its aerophilicity. We discuss this phenomenon where the ingredients of classical capillary rise are inverted, which leads to noticeable dynamical features. (1) The main regime of air invasion is linear in time, due to the viscous resistance of water. (2) Menisci in tubes with millimetre-size radii strongly oscillate before reaching their equilibrium depth, a consequence of inertia. On the whole, capillary descent provides a broad variety of dynamics where capillary effects, viscous friction and liquid inertia all play a role.

Graphical abstract: Capillary descent

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The article was received on 05 Mar 2018, accepted on 21 May 2018 and first published on 21 May 2018

Article type: Paper
DOI: 10.1039/C8SM00453F
Citation: Soft Matter, 2018,14, 5364-5368
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    Capillary descent

    J. Delannoy, H. de Maleprade, C. Clanet and D. Quéré, Soft Matter, 2018, 14, 5364
    DOI: 10.1039/C8SM00453F

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