Title:
Kinetic approach to the mathematical modelling of collisional physical and chemical processes in planetary atmospheres
Authors:
Shematovich, V. I.; Bisikalo, D. V.; Marov, M. Ia.
Affiliation:
AB(Russian Academy of Sciences, Astronomical Council, Moscow, Russia) AC(Russian Academy of Sciences, Institute of Applied Mathematics, Moscow, Russia)
Journal:
IN: Rarefied gas dynamics; Proceedings of the 17th International Symposium, Aachen, Germany, July 8-14, 1990 (A92-52701 22-77). Weinheim, Germany and New York, VCH Verlagsgesellschaft mbH, 1991, p. 345-352.
Publication Date:
00/1991
Category:
Thermodynamics and Statistical Physics
Origin:
STI
NASA/STI Keywords:
KINETIC THEORY, MATHEMATICAL MODELS, MOLECULAR COLLISIONS, PHOTOCHEMICAL REACTIONS, PLANETARY ATMOSPHERES, RAREFIED GAS DYNAMICS, AERONOMY, IONIZED GASES, NONEQUILIBRIUM THERMODYNAMICS, OXYGEN ATOMS, SOLAR RADIATION, STOCHASTIC PROCESSES, UPPER ATMOSPHERE
Bibliographic Code:
1991rgd..proc..345S

Abstract

A stochastic simulation method for investigating the photochemistry and dynamics of upper planetary atmospheres is developed. The method consists of the construction of a stochastic numerical model which presents the discrete approximation of the initial kinetic system and in the realization of computer experiments using this model. It is shown that the proposed kinetic model makes it possible to investigate the arbitrary nonequilibrium states of rarefied upper-atmosphere gas under the effect of solar radiation. Results are presented of a detailed numerical analysis of the kinetic rates of the production of excited and ionized particles during multichannel dissociation and ionization reactions and the thermalization rates of photochemical products such as primary photoelectrons and superthermal oxygen atoms.