Resonant acoustic propagation and negative density in liquid foams

Juliette Pierre; Benjamin Dollet; Valentin Leroy

doi:10.1103/PhysRevLett.112.148307

Resonant acoustic propagation and negative density in liquid foams

Juliette Pierre, Benjamin Dollet, Valentin Leroy

Research output: Contribution to journal › Article › peer-review

Abstract

We measured the dispersion relation for acoustic longitudinal waves in liquid foams, over a broad frequency range (60-600 kHz). Strong dispersion was found, with two nondispersive behaviors, separated by a negative density regime. A new model, based on the coupled displacements of films, liquid channels, and gas in the foam, rationalizes all the experimental findings.

Original language	English
Article number	148307
Journal	Physical Review Letters
Volume	112
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.112.148307
Publication status	Published - 11 Apr 2014
Externally published	Yes

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10.1103/PhysRevLett.112.148307

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title = "Resonant acoustic propagation and negative density in liquid foams",

abstract = "We measured the dispersion relation for acoustic longitudinal waves in liquid foams, over a broad frequency range (60-600 kHz). Strong dispersion was found, with two nondispersive behaviors, separated by a negative density regime. A new model, based on the coupled displacements of films, liquid channels, and gas in the foam, rationalizes all the experimental findings.",

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AB - We measured the dispersion relation for acoustic longitudinal waves in liquid foams, over a broad frequency range (60-600 kHz). Strong dispersion was found, with two nondispersive behaviors, separated by a negative density regime. A new model, based on the coupled displacements of films, liquid channels, and gas in the foam, rationalizes all the experimental findings.

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Resonant acoustic propagation and negative density in liquid foams

Abstract

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