Physics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40.1139b&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 40, no. 8, Aug. 1992, p. 1139-1152.
Physics
Atmospheric Diffusion, Atmospheric Models, Earth Atmosphere, F Region, Gas Expansion, Gas Injection, Atmospheric Chemistry, Chemical Reactions, Gaseous Diffusion, Reacting Flow
Scientific paper
An analytic model for the expansion of a chemically reacting gas in the upper atmosphere is discussed. The spatial-temporal distribution of released particles in the initial regime is described on the basis of self-similar solutions of Euler's equations. In the case of transition to the diffusion regime an approximate solution of the kinetic equation with the collision integral in the form of BGK is performed. Gravitation and the atmospheric inhomogeneity are taken into account, The diffusion regime is described by an analytic solution of the diffusion equation in an exponential atmosphere taking account of possible losses of the gas due to chemical reactions. Some peculiarities of the expansion of various gases as well as the possibility of applying the model for describing ionospheric 'holes' are discussed.
Bruskin L. G.
Khazanov George V.
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