Visco-thermal Effects in Acoustic Metamaterials Based on Local Resonances.

Vicente Cutanda Henriquez, Jose Sánchez-Dehesa

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Abstract

This chapter is devoted to study the contribution of viscothermal effects in some specific acoustic metamaterials. Particularly, in those whose negative effective parameters are a consequence of embedded resonances in the building units. The chapter briefly reports the different approaches developed in order to study viscothermal losses in environments where their expected contribution is relevant. The finite element method and the boundary element method (BEM) can be used when explaining the properties of artificial structures with corrugated surfaces where viscothermal losses are relevant, like the ones analyzed here. The BEM is applied to comprehensively study the case of a single‐negative metamaterial. This quasi‐two‐dimensional metamaterial structure is made of a two‐dimensional waveguide with a square distribution of drilled holes and effectively behaves as a material with negative bulk modulus as the one introduced by Fang et al.

Original languageEnglish
Title of host publicationFundamentals and Applications of Acoustic Metamaterials: From Seismic to Radio Frequency
EditorsVicente Romero‐García, Anne‐Christine Hladky‐Hennion
Volume1
PublisherWiley
Publication date2019
Pages1-24
Chapter1
ISBN (Print)9781786303363
DOIs
Publication statusPublished - 2019

Cite this

Cutanda Henriquez, V., & Sánchez-Dehesa, J. (2019). Visco-thermal Effects in Acoustic Metamaterials Based on Local Resonances. In V. Romero‐García, & AC. Hladky‐Hennion (Eds.), Fundamentals and Applications of Acoustic Metamaterials: From Seismic to Radio Frequency (Vol. 1, pp. 1-24). Wiley. https://doi.org/10.1002/9781119649182.ch1