Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979avest..13...99b&link_type=abstract
(Astronomicheskii Vestnik, vol. 13, Apr.-June 1979, p. 99-105.) Solar System Research, vol. 13, no. 2, Oct. 1979, p. 77-81. Tra
Astronomy and Astrophysics
Astronomy
Kinetic Equations, Meteorite Collisions, Meteoroids, Molecular Collisions, Surface Reactions, Vaporizing, Boltzmann Transport Equation, Energy Transfer, Momentum Transfer, Shielding
Scientific paper
The problem of the shielding of the surface of a meteoroid by reflected air molecules under conditions of weak shielding is solved by the application of the theory of first collisions (TFC), which is based on the solution of Boltzmann's kinetic equation or model equations approximating it. Values are obtained for the energy and momentum transfer coefficients as well as for the factors zeta, which take account of the fact that part of the colliding molecules are lost through return to the body. The lower limits to the applicability of TFC (with respect to altitude) and the upper limits of meteoroid radii for which TFC is applicable are estimated.
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