Effects of shielding the surface of a meteoroid by molecules that are flying off and evaporating. II - Shielding under conditions of the start of intense evaporation

Details Effects of shielding the surface of a meteoroid by molecules that are flying off and evaporating. II - Shielding under conditions of the start of intense evaporation Effects of shielding the surface of a meteoroid by molecules that are flying off and evaporating. II - Shielding under conditions of the start of intense evaporation

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980avest..13..169b&link_type=abstract

(Astronomicheskii Vestnik, vol. 13, July-Sept. 1979, p. 169-177.) Solar System Research, vol. 13, no. 3, Jan. 1980, p. 129-136.

Computer Science

Numerical Analysis

Evaporation, Heat Shielding, Meteoroids, Molecular Diffusion, Cylindrical Bodies, Flat Surfaces, Knudsen Flow, Molecular Flow, Numerical Analysis, Spheres

Scientific paper

The paper examines shielding of the meteoroid surface by evaporating molecules. The fraction of molecules which evaporated and shield the meteoroid was computed for the case of the meteoroid motion in the transition regime at Knudsen numbers from 4 to 0.25 at the start of intense evaporation. Evaporation from the flat front surface of a cylinder and from a sphere is examined, and the maximum dimensions of particles whose shielding effect can be neglected was estimated. It is noted that for strong shielding conditions, the cloud of evaporated molecules should be considered as a continuous medium rather than a collection of individual molecules; this will make the equations derived here unapplicable, and the case will be examined in a future paper.

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