Physics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.8813s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Aug. 1, 1987, p. 8813-8820. DNA-Navy-supported research.
Physics
8
Coulomb Collisions, Earth Ionosphere, Kelvin-Helmholtz Instability, Particle Motion, Plasma Dynamics, Space Plasmas, Convective Flow, Electron Energy, F Region
Scientific paper
The effect of parallel electron motion on the transverse Kelvin-Helmholtz instability is considered as a first step toward a three-dimensional analysis of the nature of convective flows in the high-latitude ionosphere. A general stability criterion for a specific velocity profile is given, and it is shown that the physical mechanism for stabilization is the compressional energy given to the electrons parallel to B. The effects of collisions on the instability are analyzed. In analogy with the role of gravity on Kelvin-Helmholtz instability in neutral fluids, it is observed that the parallel electron dynamics simulate buoyancy of a fluid in a gravitational field.
Huba Joseph D.
Lee Young Choon
Satyanarayana P.
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