Ionospheric turbulence - Interchange instabilities and chaotic fluid behavior

Details Ionospheric turbulence - Interchange instabilities and chaotic fluid behavior Ionospheric turbulence - Interchange instabilities and chaotic fluid behavior

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12...65h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, Jan. 1985, p. 65-68. Research supported by the U.S. Defense Nuclear Agen

Physics

24

Ionospheric Disturbances, Plasma Turbulence, Space Plasmas, Taylor Instability, Collisional Plasmas, Coupled Modes, Nonlinear Equations, Strange Attractors

Scientific paper

A set of mode coupling equations is developed which describes the nonlinear evolution of the Rayleigh-Taylor and E x B gradient drift instabilities which are relevant to the ionosphere. It is shown that for a three-mode system, the nonlinear equations describing these instabilities correspond exactly to the Lorenz equations which approximately describe the Rayleigh-Benard instability. It is shown that the three mode system can exhibit a strange attractor with chaotic behavior. Ion inertia plays a critical role in this phenomenon in that if it is neglected, as in the collisional limit, the three mode system does not exhibit chaos and a stable convection pattern results.

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