V. G. Makaryan, N. E. Molevich, D. P. Porfir'ev, “The classification of gas-dynamic structures described by the nonlinear acoustical equation of a relaxing medium”, Vestnik Samarskogo Gosudarstvennogo Universiteta. Estestvenno-Nauchnaya Seriya, 2009, Issue 6(72),Pages <nobr>92

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Mechanics

The classification of gas-dynamic structures described by the nonlinear acoustical equation of a relaxing medium

V. G. Makaryan^a, N. E. Molevich^b, D. P. Porfir'ev^a

^a Dept. of Physics, Samara State Aerospace University, Samara, 443086, Russia
^b Samara Branch, Samara, Russia

Abstract: Analytical and numerical solutions of a nonlinear acoustical equation of a relaxing medium are considired. The full classification of the stationary structures described by this equation is given.

Keywords: shock wave, stationary structure, self-sustained wave, stability, nonequilibrium medium, relaxation, sound amplification, negative dispersion, negative viscosity.

UDC: 533.6

Received: 29.05.2009
Revised: 29.05.2009