Physics
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23..437s&link_type=abstract
Planetary and Space Science, vol. 23, Mar. 1975, p. 437-485.
Physics
45
Aeronomy, Atmospheric Models, Boltzmann Transport Equation, F Region, Gas Mixtures, Collisional Plasmas, Collisionless Plasmas, Distribution Functions, Flow Velocity, Heat Flux, Ionospheric Disturbances, Navier-Stokes Equation, Pressure Effects, Rarefied Gases, Riometers, Thermal Diffusion
Scientific paper
In this paper we present results for a general system of transport equations appropriate to a multi-constituent gas mixture. In the limit of very frequent collisions the pressure tensor and heat flow equations of this system give the usual Navier-Stokes results for the viscous stress tensor and heat flow vector. Furthermore, the momentum equation of the system includes thermal diffusion and thermoelectric transport coefficients equivalent to the second approximation of Chapman and Cowling. The basic equations have been applied to different regions of the ionosphere and neutral atmosphere. It is found that: (1) the viscous stress tensor and heat flow expressions used in previous studies of the neutral thermosphere may not be appropriate; (2) the transport coefficients normally used for mid-latitude F2-region and topside studies seem to be adequate; (3) the high speed flow of plasma in the polar topside ionosphere is likely to be strongly affected by stress and heat flow; and (4) E- and F-region ionization at high latitudes is substantially affected by stresses and heat flow.
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