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Pré-Publication, Document De Travail Année : 2008

Multiple Scattering and Visco-Thermal Effects on 2D Phononic Crystal

Résumé

In this paper, we are interested in the transition between regimes here either visco-thermal or multiple scattering effects dominate for the propagation of acoustic waves through a 2D regular square array of rigid cylinders embedded in air. An extension of the numerical method using Schlömilch series is performed in order to account for visco-thermal losses. Comparison withexperimental data and results from classical homogenization theory allows to study the transition between a low frequency limit (where viscous and thermal effects dominate) and a high frequency regime (where multiple scattering effects become predominant). For this particular geometry, a large frequency domain where visco-thermal and multiple scattering effects coexist is found.
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Dates et versions

hal-00305413 , version 1 (24-07-2008)

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Aroune Duclos, Denis Lafarge, Vincent Pagneux. Multiple Scattering and Visco-Thermal Effects on 2D Phononic Crystal. 2008. ⟨hal-00305413⟩
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