Ionospheric plasma cloud dynamics via regularized contour dynamics. I - Stability and nonliner evolution of one-contour models

Details Ionospheric plasma cloud dynamics via regularized contour dynamics. I - Stability and nonliner evolution of one-contour models Ionospheric plasma cloud dynamics via regularized contour dynamics. I - Stability and nonliner evolution of one-contour models

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phfl...26.1139o&link_type=abstract

Physics of Fluids (ISSN 0031-9171), vol. 26, April 1983, p. 1139-1153.

Physics

20

Atmospheric Models, Ionospheric Ion Density, Plasma Clouds, Plasma Dynamics, Dynamic Models, Electric Fields, Equations Of Motion, Linear Equations, Magnetohydrodynamic Stability, Mathematical Models, Partial Differential Equations, Tables (Data)

Scientific paper

An ionospheric plasma cloud is modeled by piecewise-constant ion density regions, accomplishing regularization by means of a tangential diffusion operator modeling aspects of the diffusion operator in two dimensions, in order to study liner stability and nonlinear evolution. A complete linear stability analysis of a circular cloud indicates that a single mode exc itation cascades downward in number with increasing amplitude, due to symmetry-breaking by the electric field. A simple rescaling demonstrates that clouds with large cloud ion density/ambient ion density ratio values evolve more slowly, and appear more dissipative. Nonlinear regime calculations show the experimentally observed 'backside' striations, and a secondary structure arises on the sides of the primary striations at long times.

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