When, how, and why the path of an air bubble rising in pure water becomes unstable - Institut mécanique des fluides de Toulouse Accéder directement au contenu
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2023

When, how, and why the path of an air bubble rising in pure water becomes unstable

Résumé

Recently, [Herrada, M. A. and Eggers, J. G., Proc. Natl. Acad. Sci. U.S.A. 120, e2216830120 (2023)] reported predictions for the onset of the path instability of an air bubble rising in water and put forward a physical scenario to explain this intriguing phenomenon. In this Brief Report, we review a series of previously established results, some of which were overlooked or misinterpreted by the authors. We show that this set of findings provides an accurate prediction and a consistent explanation of the phenomenon that invalidates the suggested scenario. The instability mechanism actually at play results from the hydrodynamic fluid-body coupling made possible by the unconstrained motion of the bubble which behaves essentially, in the relevant size range, as a rigid, nearly spheroidal body on the surface of which water slips freely.
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Dates et versions

hal-04024265 , version 1 (10-03-2023)

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Paul Bonnefis, David Fabre, Jacques Magnaudet. When, how, and why the path of an air bubble rising in pure water becomes unstable. Proceedings of the National Academy of Sciences of the United States of America, 2023, 120 (11), ⟨10.1073/pnas.2300897120⟩. ⟨hal-04024265⟩
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