Acoustic phenomena in porous media studied by transient grating spectroscopy: A critical test of the Biot theory
Anno: 2008
Autori: Taschin A., Cucini R., Bartolini P., Torre R.
Affiliazione autori: Univ Florence, LENS, I-50019 Florence, Italy; Univ Roma La Sapienza, INFM CRS Soft Matter CNR, I-00185 Rome, Italy; Univ Florence, Dipartimento Fis, I-50019 Florence, Italy.
Abstract: Acoustic-wave propagation in liquid-filled porous glasses has been studied by a heterodyne detected transient grating experiment. A test of the Biot theory is presented under two new regimes, namely, for a new frequency range up to 1.3 GHz and for porous media with nanometric scale heterogeneities. We show that the Biot theory describes the sound velocity data correctly, but does not account for the acoustic attenuation. We suggest that the acoustic damping is mainly due to the dissipation mechanisms intrinsic of the matrix and the liquid which are not accounted for in the theory.
Giornale/Rivista: EUROPHYSICS LETTERS
Volume: 81 (5) Da Pagina: 58003-1 A: 58003-6
Parole chiavi: Elastic Waves; Liquids; Sound; Propagation; Attenuation; ScatteringDOI: 10.1209/0295-5075/81/58003Citazioni: 11dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-29Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
