Propagation of intense acoustic waves in sonic crystals

[EN] The propagation of intense acoustic waves in a periodic medium (sonic crystal) is numerically studied. The medium consists in a structured fluid, formed by a periodic array of fluid layers with alternating linear acoustic properties and quadratic nonlinearity coefficient. The spacing between la...

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Detalles Bibliográficos
Autores: Jimenez, Noe|||0000-0002-6539-670X, Sánchez Morcillo, Víctor José|||0000-0003-4766-1263, Picó Vila, Rubén|||0000-0003-3537-9658, García-Raffi, L. M.|||0000-0003-3985-8453, Mehrem Issa Mohamed Mehrem, Ahmed, Hamham, El Mokhta
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/62087
Acceso en línea:https://riunet.upv.es/handle/10251/62087
Access Level:acceso abierto
Palabra clave:Intense acoustic waves
Sonic crystals
Nonlinear acoustic
Harmonics
Band gaps
Second harmonic generation
Layered media
MATEMATICA APLICADA
FISICA APLICADA
Descripción
Sumario:[EN] The propagation of intense acoustic waves in a periodic medium (sonic crystal) is numerically studied. The medium consists in a structured fluid, formed by a periodic array of fluid layers with alternating linear acoustic properties and quadratic nonlinearity coefficient. The spacing between layers is of the order of the wavelength; therefore Bragg effects such as band gaps appear. We show that the interplay between strong dispersion and nonlinearity influences wave propagation. The classical waveform distortion process typical of intense acoustic waves in homogeneous media can be strongly altered when nonlinearly generated harmonics lie inside or close to band gaps.

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