Acoustic signal associated with the bursting of a soap film which initially closes an overpressurized cavity

Abstract : We report an experimental study of the sound produced by the bursting of a thin liquid film, which initially closes an overpressurized cylindrical cavity. There is a need for a deep understanding of the phenomenon, which can be very useful in numerous practical cases. For instance, in the nature, the volcanologists observe the bursting of large, elongated, gas-bubbles at the surface of lava lakes and record the associated sound emission. One can wonder which pieces of information they can get from such acoustic measurements. For a didactic purpose, we provide also the reader with all the theoretical background necessary for the understanding of the physical processes that govern the various characteristics of the acoustic signals: the cavity geometry governs the frequency; the viscous dissipation and the radiation are responsible for the damping; the acoustic energy informs about the characteristic time associated with the film-rupture more than about the energy initially loaded in the cavity.
Keywords : Acoustics Volcanoes
Type de document :
Pré-publication, Document de travail
2007
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00178764
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  • HAL Id : ensl-00178764, version 1

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Jean-Christophe Géminard, Valérie Vidal, Thibaut Divoux, Francisco Melo. Acoustic signal associated with the bursting of a soap film which initially closes an overpressurized cavity. 2007. 〈ensl-00178764〉

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