phase shift/ A5220 Elementary processes in plasma A5235 Waves, oscillations, and instabilities in plasmaThe effect of collisions on longitudinal waves in a plasma with an initial anisotropic pressure has been considered and the time evolution of the amplitude and the phase of the wave are ...
Results. Numerical simulation showed that over time, the velocity and amplitude of the deformation waves remain unchanged, and the wave propagation direction concurs with the positive direction of the longitudinal axis. The latter specifies that the velocity of the waves is supersonic. For a ...
Similarly, conventional expressions for high-frequency (instantaneous) elastic moduli, predicting their divergence as n increases, are meaningless in this regime. Relations of the longitudinal and transverse elastic velocities of the QCA model to the adiabatic sound velocity, measured in MD simulations, ...
It is also noteworthy that the ion oscillations, which for small k have the properties usually associated with an acoustic wave (longitudinal polarization, ω∝ k), are obtained using a formalism which is sometimes designated as ``collisionless.'' 展开 关键词:...
A theory of the small-amplitude oscillations of an ionized gas in a static magnetic field is developed, including the effects of temperature motions. The Boltzmann equation is solved for this problem, and exact expressions are obtained for the distribution function and dispersion relation. A general...
The theory of particle aspect analysis is extended to a drift wave in the presence of an inhomogeneous magnetic field and an applied electric field paralle... M.,S.,Tiwari,... - 《Journal of Plasma Physics》 被引量: 8发表: 1991年 Plasma Oscillations in a Magnetic Field The small amplitud...
Speed of sound waves in gases and liquids are governed by the compressibility of the medium. There exists another type of non-dispersive wave where the wave speed depends on stress instead of elasticity of the medium. A well-known example is the Alfven wave, which propagates through plasma pe...
A mean climatology of these variations taken from years 1990–1997 is presented. Strong peaks in zonal and meridional winds are found at tidal periods and for the quasi 2-day wave. Zonal spectra exhibit considerable power at periods of 3–10 days, with transient oscillations with periods near ...
The gyroscopic coupling between the transverse displacement components induces rotational motions of points along the rope, as the wave propagates, with a variable speed, along the waveguide. Also, the gravity-dependent terms in (2) are proportional to the spatial derivatives of the transverse ...
Previous studies have shown that the majority of the ultrasound energy propagates through water and soft tissue as a longitudinal wave with alternating compression and rarefaction phases. These two phases create pressures that are alternately higher and lower than the ambient pressure level, respectively...