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- W89649431 abstract "Finite-amplitude sound waves in a nonisothermal, weakly ionized plasma are studied. The primary distinction between the acoustics of plasmas and the acoustics of an un-ionized gas is the instability of sound waves caused by heat exchange between heavy particles and the hot electron gas. Nonlinear equations are derived to describe the wave evolution. General equations are derived for the dispersion of the phase velocity and the damping rate (growth rate) of small-amplitude waves. The saturation of the acoustic instability and the shape of the steady-state sound waves are studied. A steady-state, approximately sinusoidal wave is formed near the stability boundary. Far from this boundary, the steady-state wave has a sawtooth shape. The latter case is studied in the limits of low and high frequencies. Electron heat transport and sources of electron heating affect the nature of the instability and the shape of the steady-state acoustic waves. If the difference between the temperatures of the electrons and the heavy particles is sufficiently large the dissipation coefficient changes (the medium acquires a ''negative viscosity''). An explosive instability occurs." @default.
- W89649431 created "2016-06-24" @default.
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- W89649431 date "1979-03-01" @default.
- W89649431 modified "2023-09-23" @default.
- W89649431 title "Nonlinear sound waves in a plasma" @default.
- W89649431 hasPublicationYear "1979" @default.
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