Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993avest..27...65b&link_type=abstract
Astronomicheskii Vestnik (ISSN 0320-930X), vol. 27, no. 3, p. 65-74
Other
Bolides, Fracture Mechanics, Fragmentation, Vapor Jets, Granular Materials, Meteor Trails, Particles, Vapor Pressure
Scientific paper
The quasi-continuous fragmentation (husking) takes place not only for the small, but also for big meteoroids. The direct evidence for this process is the dusty trail of bolides. The possible physical mechanisms of this event are discussed. It is concluded that the main mechanism of the quasi-continuous fragmentation is the carrying away of the solid, tightly melting particles (grains) form the marginal zones of the meteor body, by the vapor flow generated on the head part of the surface, under the expansion and contracting of the layers joining these grains to the body. These grains tighten in the wake zone after the body and survive, forming the dusty trails. The dimensions of the separating particles are contained in the range 2-100 micrometers (the mode - about 10 micrometers). Another part of the solid particles will be shielded by the vapor pressure from the frontal surface, but they will quickly evaporate.
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