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Generation of fine aerosol as a dispersion of unstable fusion film of ablating meteoroid

Authors
Journal
Journal of Aerosol Science
0021-8502
Publisher
Elsevier
Publication Date
Volume
25
Issue
7
Identifiers
DOI: 10.1016/0021-8502(94)90131-7

Abstract

Abstract It is shown that a hydrodynamic mechanism of fine aerosol formation is possible as a result of quasicontinuous tearing-off of particles from the liquid fusion film of meteoroid or spacecraft in the high atmosphere. The tearing-off process occurs due to hydrodynamic instability of the film (of Kelvin-Helmholtz or Rayleigh-Taylor type) as it interacts with a high-speed air stream. Two special cases, particle ablation from the front of the meteoroid, and from its side, are considered in detail. A theoretical analysis for determining the criteria for the formation of particles is presented and evaluations for particles and periods of their tearing-off are obtained. The predictions are compared with representative experimental data.

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