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- W4288287072 abstract "We report on the extensional dynamics of spinning drops in miscible and immiscible background fluids following a rotation speed jump. Two radically different behaviours are observed. Drops in immiscible environments relax exponentially to their equilibrium shape, with a relaxation time that does not depend on the centrifugal forcing. We find an excellent quantitative agreement with the relaxation time predicted for quasi-spherical drops by Stone and Bush (Q. Appl. Math. 54, 551 (1996)), while other models proposed in the literature fail to capture our data. By contrast, drops immersed in a miscible background fluid do not relax to a steady shape: they elongate indefinitely, their length following a power-law $l(t)sim t^{frac{2}{5}}$ in very good agreement with the dynamics predicted by Lister and Stone (J. Fluid Mech. 317, 275 (1996)) for inviscid drops. Our results strongly suggest that low compositional gradients in miscible fluids do not give rise to an effective interfacial tension measurable by spinning drop tensiometry." @default.
- W4288287072 created "2022-07-28" @default.
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- W4288287072 date "2019-07-05" @default.
- W4288287072 modified "2023-09-26" @default.
- W4288287072 title "Spinning drop dynamics in miscible and immiscible environments" @default.
- W4288287072 doi "https://doi.org/10.48550/arxiv.1907.02802" @default.
- W4288287072 hasPublicationYear "2019" @default.
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