Spatial trapping of acoustic waves in bubbly liquids

The propagation of acoustic waves in fluids containing low-density bubbles is investigated, using a plane wave approach. Band structures, densities of modes and density of energy maps are computed in order to understand the mechanisms responsible for the generation of complete frequency gaps in thes...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2001-02, Vol.296 (1), p.195-200
Main Authors: Goffaux, C., Vigneron, J.P.
Format: Article
Language:English
Subjects:
Acoustic waves
Acoustical properties of liquids
Band gaps
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Periodic and random systems
Physics
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Summary:The propagation of acoustic waves in fluids containing low-density bubbles is investigated, using a plane wave approach. Band structures, densities of modes and density of energy maps are computed in order to understand the mechanisms responsible for the generation of complete frequency gaps in these three-dimensional structures. The dependence of the band gap on different parameters such as the mass density and the sound velocity for different symmetries is discussed. A large unit cell containing randomly placed bubbles shows, for optimized values of the parameters, a strong level of wave confinement and the appearance of wide gaps.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(00)00800-0