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Pré-Publication, Document De Travail Année : 2019

Analysis of a Sugimoto's model of nonlinear acoustics in an array of Helmholtz resonators

Résumé

A coupled system involving a nonlinear scalar PDE and a linear ODE is theoretically investigated. This hypebolic system with relaxation models the propagation of nonlinear waves in a waveguide connected to Helmholtz resonators, this device being an example of a nonlinear acoustic metamaterial. In a previous paper [Sugimoto, J. Fluid. Mech. 1992], it has been shown that this device allows also the propagation of acoustic solitons. In the present paper, the mathematical properties of the coupled system are analysed: formation of singularity in finite time, existence of global smooth solutions for small data, existence of entropy solutions in fractional BV spaces and uniqueness with a single family of entropies. New results are also deduced about weakly coupled systems. Numerical simulations illustrate these findings.
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Dates et versions

hal-02186692 , version 1 (17-07-2019)
hal-02186692 , version 2 (21-04-2020)

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  • HAL Id : hal-02186692 , version 1

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Stéphane Junca, Bruno Lombard. Analysis of a Sugimoto's model of nonlinear acoustics in an array of Helmholtz resonators. 2019. ⟨hal-02186692v1⟩
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