Non-wetting drops at liquid interfaces: From liquid marbles to Leidenfrost drops

Abstract

We consider the flotation of deformable, non-wetting drops on a liquid interface. We consider the deflection of both the liquid interface and the droplet itself in response to the buoyancy forces, density difference and the various surface tensions within the system. Our results suggest new insight into a range of phenomena in which such drops occur, including Leidenfrost droplets and floating liquid marbles. In particular, we show that the floating state of liquid marbles is very sensitive to the tension of the particle-covered interface and suggest that this sensitivity may make such experiments a useful assay of the properties of these complex interfaces.

arXiv comment21 pages, 9 figures. Minor typos corrected

References in corpus (4)

• Elasticity of an interfacial particle raft
• Maximum size of drops levitated by an air cushion
• Leidenfrost drops on a heated liquid pool
• Mutual adaptation of a Faraday instability pattern with its flexible boundaries in floating fluid drops

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• Progressive friction mobilization and enhanced Janssen's screening in confined granular rafts
• Buoyancy and capillary effects on floating liquid lenses
• Equilibrium shapes and floatability of static and vertically vibrated heavy liquid drops on the surface of a lighter fluid
• Elastocapillary morphing of self-encapsulated droplets floating at the oil-air interface