Resonant Acoustic Propagation and Negative Density in Liquid Foams

被引：57

作者：

Pierre, Juliette ^{[1
]}

Dollet, Benjamin ^{[2
]}

Leroy, Valentin ^{[1
]}

机构：

[1] Univ Paris Diderot, Lab Mat & Syst Complexes, CNRS UMR 7057, F-75205 Paris 13, France

[2] Univ Rennes 1, Inst Phys Rennes, CNRS UMR 6251, F-35042 Rennes, France

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 14期

关键词：

SOAP FILMS; SOUND; DISPERSIONS; ATTENUATION; ULTRASOUND; PRESSURE; VELOCITY; WAVES; WATER;

D O I：

10.1103/PhysRevLett.112.148307

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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