Nonlinear Distortion and Attenuation of Intense Acoustic Waves in Lossy Media Obeying a Frequency Power Law
Date
2000Author
S, S. KashcheevaSapozhnikov, Oleg
Khokhlova, V.
AVERKIOU, MICHALAKIS A.
Crum, Lawrence
Source
Acoustical Physics - ACOUST PHYS-ENGL TRVolume
46Pages
170-177Google Scholar check
Metadata
Show full item recordAbstract
Nonlinear propagation of a periodic wave and a single pulse with a shack front through a lossy medium is studied theoretically. The medium is characterized by the frequency dependence of the attenuation coefficient obeying a power law and by a corresponding dispersion law. The numerical modeling of the problem is performed on the basis of the modified spectral approach. It is found that the exponent of the aforementioned power law essentially affects the efficiency of nonlinear interactions, the distortion of the wave profile, and the absorption of acoustic energy in the nonlinear mode. The stability of the discontinuous structure of a shock front is investigated for different power laws close to a linear one. The possibility of pulsed diagnostics of the parameters of the frequency power law governing the attenuation in the medium by the shape of a single pulse with a shock front after its passage through the medium is considered. (C) 2000 MAIK "Nauka/Interperiodica".