Issue 39, 2021

Thermophobic Leidenfrost

Abstract

We report that a volatile liquid deposited on a hot substrate with a gradient of temperature does not only levitate (Leidenfrost effect), but also spontaneously accelerates to the cold. This thermophobic effect is also observed with sublimating solids, and we attribute it to the ability of temperature differences to tilt (slightly) the base of the “object”, which induces a horizontal component to the levitating force. This scenario is tested by varying the drop size (with which the acceleration increases) and the substrate temperature (with which the acceleration decreases), showing that the effect can be used to control, guide and possibly trap the elusive Leidenfrost drops.

Graphical abstract: Thermophobic Leidenfrost

Supplementary files

Article information

Article type
Paper
Submitted
14 avr. 2021
Accepted
19 juin 2021
First published
23 juin 2021

Soft Matter, 2021,17, 8805-8809

Thermophobic Leidenfrost

A. Bouillant, B. Lafoux, C. Clanet and D. Quéré, Soft Matter, 2021, 17, 8805 DOI: 10.1039/D1SM00548K

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