Residual mass from ablation of meteoroid grains detached during atmospheric flight

Details Residual mass from ablation of meteoroid grains detached during atmospheric flight Residual mass from ablation of meteoroid grains detached during atmospheric flight

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34.1201f&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, Dec. 1986, p. 1201-1212. NSERC-supported research.

Computer Science

10

Ablation, Atmospheric Entry, Mass, Meteoroids, Differential Equations, Grains

Scientific paper

Assuming meteoroids to be a collection of tiny grains and using the ablation model described by Nicol et al. (1985), the differential equations governing ablation of grains detached from meteoroids at different heights during atmospheric flight are numerically solved. Initial velocities from 12 to 70 km/s and initial masses from 10 to the -5th to 10 to the -13th kg were considered; calculations were completed for grains detached at heights of 100, 120, 100, 95, 90, 85, 80, and 75 km. It was found that particles ejected at heights of 100 km and above behave essentially as independent particles incident from infinity; hence, the results of earlier studies (e.g., Nicol et al., 1985) can be applied. For ejection at lower heights, the resultant residual mass is somewhat less than that corresponding to grains of the same initial mass and velocity. The difference is greatest for high-velocity low-mass meteors. Typical calculations are presented to show that the in-flight fragmentation of dustballs can be an important source of macroscopic ablation-product micrometeorites.

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