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Article Dans Une Revue Annual Review of Fluid Mechanics Année : 2018

Elastocapillarity: When Surface Tension Deforms Elastic Solids

Résumé

Although negligible at large scales, capillary forces may become dominant for submillimetric objects. Surface tension is usually associated with the spherical shape of small droplets and bubbles, wetting phenomena , imbibition or the motion of insects at the surface of water. However, beyond liquid interfaces, capillary forces can also deform solid bodies in their bulk as observed in recent experiments with very soft gels. Capillary interactions, which are responsible for the cohesion of sand castles, can also bend slender structures and induce the bundling of arrays of fibres. Thin sheets can finally spontaneously wrap liquid droplets within the limit of the constraints dictated by di↵erential geometry. The aim of this review is to describe the di↵erent scaling parameters and characteristic lengths involved in "elastocapillarity". We focus successively on three main configurations: • 3D, deformations induced in bulk solids • 1D, bending and bundling of rod-like structures • 2D, bending and stretching of thin sheets Although each configuration would deserve a detailed review, we hope our broad description will provide a general view on elastocapillarity. 1
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Dates et versions

hal-02359002 , version 1 (12-11-2019)

Identifiants

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José Bico, Etienne Reyssat, Benoit Roman. Elastocapillarity: When Surface Tension Deforms Elastic Solids. Annual Review of Fluid Mechanics, 2018, 50 (1), pp.629-659. ⟨10.1146/annurev-fluid-122316-050130⟩. ⟨hal-02359002⟩
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