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Issue 12, 2018
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Water ring-bouncing on repellent singularities

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Texturing a flat superhydrophobic substrate with point-like superhydrophobic macrotextures of the same repellency makes impacting water droplets take off as rings, which leads to shorter bouncing times than on a flat substrate. We investigate the contact time reduction on such elementary macrotextures through experiment and simulations. We understand the observations by decomposing the impacting drop reshaped by the defect into sub-units (or blobs) whose size is fixed by the liquid ring width. We test the blob picture by looking at the reduction of contact time for off-centered impacts and for impacts in grooves that produce liquid ribbons where the blob size is fixed by the width of the channel.

Graphical abstract: Water ring-bouncing on repellent singularities

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Publication details

The article was received on 08 Oct 2017, accepted on 08 Jan 2018 and first published on 09 Jan 2018

Article type: Paper
DOI: 10.1039/C7SM02004J
Citation: Soft Matter, 2018,14, 2227-2233
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    Water ring-bouncing on repellent singularities

    P. Chantelot, A. Mazloomi Moqaddam, A. Gauthier, S. S. Chikatamarla, C. Clanet, I. V. Karlin and D. Quéré, Soft Matter, 2018, 14, 2227
    DOI: 10.1039/C7SM02004J

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