Godunov-type computation schemes are applied to numerical simulations of wave propagations in time-dependent heterogeneous media (solids and liquids). The parametric phase conjugation of a wide band ultrasound pulse is considered. The supercritical dynamics of the acoustic field is described for one-dimensional systems containing a parametrically active solid. The impulse response function, numerically calculated for a finite active zone in an infinite medium above the threshold of absolute parametric instability, is in a good agreement with the analytical asymptotic theory. The supercritical evolution of the acoustic field spatial distribution is studied in detail for parametric excitations in an active zone of a solid layer, loaded by a semi-infinite liquid on one side and free on the other.
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January 2001
January 01 2001
Numerical simulation of acoustic wave phase conjugation in active media
S. Ben Khelil;
S. Ben Khelil
Laboratoire de Mécanique de Lille ura CNRS 1441 Cité scientifique, 59655 Villeneuve d’Ascq, France
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A. Merlen;
A. Merlen
Laboratoire de Mécanique de Lille ura CNRS 1441 Cité scientifique, 59655 Villeneuve d’Ascq, France
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V. Preobrazhensky;
V. Preobrazhensky
Wave Research Center of General Physics Institute Academy sc., 38 Vavilova Street, 117942 Moscow, Russia
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Ph. Pernod
Ph. Pernod
Institut d’Electronique et Microelectronique du Nord, DOAE, umr CNRS 8520, 59655 Villeneuve d’Ascq, France
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S. Ben Khelil
A. Merlen
V. Preobrazhensky
Ph. Pernod
Laboratoire de Mécanique de Lille ura CNRS 1441 Cité scientifique, 59655 Villeneuve d’Ascq, France
J. Acoust. Soc. Am. 109, 75–83 (2001)
Article history
Received:
January 18 2000
Accepted:
October 03 2000
Citation
S. Ben Khelil, A. Merlen, V. Preobrazhensky, Ph. Pernod; Numerical simulation of acoustic wave phase conjugation in active media. J. Acoust. Soc. Am. 1 January 2001; 109 (1): 75–83. https://doi.org/10.1121/1.1328794
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