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Solubility enhanced surfactant-induced flow in air-liquid-air sheets

arXiv Physics Tuesday 02 June 2026, 04:00 UTC By Jun Eshima, Tristan Aur\'egan, Emmanuel Villermaux, Howard A. Stone, Luc Deike 1 min read
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Announce Type: new Abstract: Liquid interfaces appear throughout nature and engineering and are typically contaminated by surface active agents (surfactants), which are characterized by a wide range of solubility. We demonstrate that solubility enhances by an order of magnitude surfactant-induced flow in air-liquid-air films, in contrast to previously studied geometries where solubility dampens the flow. The enhancement is described by a single parameter comparing the depletion length to the...

arXiv:2606.00921v1 Announce Type: new Abstract: Liquid interfaces appear throughout nature and engineering and are typically contaminated by surface active agents (surfactants), which are characterized by a wide range of solubility. We demonstrate that solubility enhances by an order of magnitude surfactant-induced flow in air-liquid-air films, in contrast to previously studied geometries where solubility dampens the flow. The enhancement is described by a single parameter comparing the depletion length to the film thickness. Our experiments are well described by an asymptotic theory of the Navier-Stokes equations with surfactant kinetics.
Originally published by arXiv Physics Read original →

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