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Pré-Publication, Document De Travail Année : 2020

Non-contact rheology of finite-size air-water interfaces

Résumé

We present non-contact atomic-force microscopy measurements of the hydrodynamic interactions between a rigid sphere and an air bubble in water at the micro-scale. The size of the bubble is found to have a significant effect on the response due to the long-range capillary deformation of the air-liquid interface. To rationalize the experimental data, we develop a viscocapillary lubrication model accounting for the finite-size effect. The comparison between experiments and theory allows us to measure the air-liquid surface tension, without contact, paving the way towards robust non-contact tensiometry of polluted air-liquid interfaces.
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Dates et versions

hal-02952832 , version 1 (29-09-2020)
hal-02952832 , version 2 (06-11-2020)
hal-02952832 , version 3 (28-02-2021)

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Vincent Bertin, Zaicheng Zhang, Rodolphe Boisgard, Christine Grauby-Heywang, Elie Raphael, et al.. Non-contact rheology of finite-size air-water interfaces. 2020. ⟨hal-02952832v2⟩
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