Dispersion relation for ion-acoustic wavesTheoretical or Mathematical/ ionospheremagnetohydrodynamic waves/ dispersion relationhydromagnetic wavesAlvenmodifiedionosphereion acoustic/ A9420 IonosphereNot Availabledoi:10.1016/0032-0633(71)90113-9M.M. Abbas
The dispersion of ion゛coustic waves in quiescent rareゞas discharge plasmas has been investigated experimentally and theoretically. Experimentally, various grid systems were used to generate the waves which were studied using a time﹐f‐flight technique. The experimental results show that two separate ...
A differential-path ultrasonic technique is used to obtain the acoustic wave propagation characteristics of a mixture of alumina (Al/sub 2/O/sub 3/) particles and epoxy (Epon 828-Z). Longitudinal and shear acoustic data are obtained over a frequency range of 0.5 to 2 MHz and a temperature...
There can exist two kinds of ion acoustic waves in a plasma, i.e. fast mode and slow mode, if the plasma consists of two ion species which masses are greatly different from each other. Fast and slow modes are mainly due to the motions of light ions and heavy ions, respectively. A sy...
is the second type of dispersion of sound. It occurs during the propagation of sound in rods and plates and in any type of acoustic wave guide. Dispersion of sound is observed for flexural waves in thin plates and rods (the thickness of the plate or rod must be much less than the lengt...
The discontinuous Lagrangian approach, allowing for a variational description of irreversible phenomena in continuum theory such as viscosity and thermal conductivity, is utilised for the analysis of damped acoustic waves. Starting from a Lagrangian for general viscous flow theory, by linearisation of the...
Thus one is assured that the numerical solutions of a high order finite difference scheme will have the same number of wave modes (namely, the acoustic, vorticity, and entropy waves), the same wave propagation characteristics (namely, nondispersive, nondissipative, and isotropic) and the same ...
This relation is demonstrated for a new example of collapse of acoustic waves in media with positive dispersion. The considered problem is particularly important for the investigation of collisionless shock waves in a plasma. 展开 关键词: Acoustic Propagation Plasma Waves Sound Waves Wave Dispersion ...
2. The retardation of radio waves that occurs when they pass through ionized gas in the interstellar medium, the speed of propagation depending on frequency: the lower the frequency the greater the delay. This delay is not observable in a continuous radio signal but is detectable in a pulsed ...
(Supplementary Fig. 7). The transmission performance of acoustic waves through the two samples are measured with a lab-made standing wave tube system (Supplementary Figs 4 to 5 and Note 2). We made sure that the largest thread lead of the metamaterial samples is smaller than 1/7 of the ...