Acoustic waves in plasma

Modeling of Interaction of Acoustic Waves With Ionosphere

“…At the instant when the gas is radially introduced into the quartz chamber, although we were not able to observe them, we may assume that vortices occur in the discharge that leads to a redistribution of gas density in the glow discharge section and forces a change in the electron distribution near the positive column portion of the discharge [13], [14]. The injection of air also leads to a reduction of gas temperature and to an increase in its density, which results in an increase in the dissociation rate, i.e., In [19] and [20], it was noted that the appearance of highly excited atoms was due to the electron impact-induced dissociation of molecules.…”

“…As they propagate upward, the high-frequency component of these acoustic waves is absorbed by the atmosphere, which results in only the infrasound component arriving at the upper layers. These powerful infrasound waves cause vortex motion of the atmosphere [13], [14]. As is reported in new observations [11], [12] based on modeling calculations, the speed of hydrodynamic particles in an acoustic wave reaches a maximum at altitudes on the order of 100 km, which is irrespective of the initial power of the acoustic beam.…”

Sonic and shock waves in gas-discharge plasma

“…12 The specific flow energy for a gas-discharge plasma can be obtained by adding the kinetic energy of the flow to Eq. ͑This same type of transformation occurs in the Joule-Thompson process.͒ As the amplitude of the sound wave increases ͑i.e., ␤ increases͒, the reduction in temperature of the plasma becomes more pronounced.…”

Effect of ultrasound waves on a hollow needle to plate electrical discharge in air or mixture of air with VOCs

“…The review of studies of the interaction of acoustic waves with plasma can be found in [7,8]. The results presented in these two papers are however devoted to the propagation of acoustic waves in a positive column of the glow discharge.…”