MAGNETOHYDRODYNAMICAL WAVES IN WAVE GUIDES. Report No. 86/VII

Technical Report · Fri May 01 04:00:00 EDT 1959

OSTI ID:4231944

Gajewski, R

ABS>Propagation of magnetohydrodynamical waves in bounded fluids is investigated. The boundary of the fluid is assumed to be a cylindrical surface of constant but not necessarily circular cross section. It is assumed that the medium is a perfect fluid and at the same time a perfect conductor, and that a constant magnetic field is applied parallel to the walls of the cylinder. It is shown that inside of such a wave guide the following types of waves can propagates (1) transversal waves propagating without dispersion vith the velocity of Alfven waves; (2) longitudinal wave, identical with the wave of the principal mode for an acoustic wave guide; (3) waves having both longitudinal and transversal components, and propagating with a dispersion, their group and phase velocity being close to respective velocities for an acoustic wave guide; (4) waves having both longitudinal and transversal components, and propagating vith a small dispersion, their group and phase velocity being close to the velocity of Alfven waves. Damping of certain modes, if applied frequency is too low, appears only for waves of the type (3); the cut-off frequencies turn out to be slightly higher than the correspondlng cut-off frequencies for an acoustic wave guide. (auth)

• Research Organization: Polish Academy of Sciences. Inst. of Nuclear Research, Warsaw
• NSA Number: NSA-13-019452
• OSTI ID: 4231944
• Report Number(s): NP-7806
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ALFVEN WAVES
CIRCUITS
CYLINDERS
ELECTRIC CONDUCTIVITY
FLUIDS
FREQUENCY
HYDROMAGNETIC WAVES
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MICROWAVES
OSCILLATIONS
PHYSICS AND MATHEMATICS
SOUND
SURFACES
VELOCITY
WAVEGUIDES