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- W2993013643 abstract "When a buoyant bubble is inserted into a closed capillary that is slightly smaller than the capillary length, it appears stuck; exactly why this is so is a puzzle that has remained unanswered over the past 50 years. Recent calculations suggest that the bubble's motion is critically dependent on the hydrodynamics of the surrounding liquid film; however, quantitative measurements of these dynamics are lacking. We provide direct measurements of the dynamics of the liquid film surrounding a “stuck” bubble, recorded using interference microscopy. The film slowly relaxes to a constant thickness, and is stabilized by disjoining pressure at long times. The film's stability at this thickness is demonstrated by recovery after applied thermal perturbations; thus, we confirm that Bretherton's buoyant bubble is not pinned at a contact line, but is instead ostensibly stuck by extraordinarily slow flow in the surrounding liquid film whose thickness is set by a balance of capillary stress and disjoining pressure.Received 11 February 2019DOI:https://doi.org/10.1103/PhysRevFluids.4.123601©2019 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasContact line dynamicsDrop & bubble phenomenaInstability of free-surface flowsInterfacial flowsSurface tension effectsThin fluid filmsWettingFluid Dynamics" @default.
- W2993013643 created "2019-12-13" @default.
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- W2993013643 date "2019-12-02" @default.
- W2993013643 modified "2023-10-07" @default.
- W2993013643 title "Bretherton's buoyant bubble" @default.
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