Recent Advances in Bolide Entry Modeling: A Bolide Potpourri

Details Recent Advances in Bolide Entry Modeling: A Bolide Potpourri Recent Advances in Bolide Entry Modeling: A Bolide Potpourri

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004em%26p...95..441r&link_type=abstract

Earth, Moon, and Planets, Volume 95, Issue 1-4, pp. 441-476

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Scientific paper

In this paper, we will review recent research on numerous aspects of bolide entry into a planetary atmosphere, including such topics as the entry dynamics, energetics, ablation, deceleration, fragmentation, luminosity, mechanical wave generation processes, a total (panchromatic) power budget including differential and integral efficiencies versus time, etc. Fragmentation, triggered by stagnation pressures exceeding the bolide breaking strength, has been subsequently included in either a collective or non-collective wake behavior limit. We have also utilized the differential panchromatic luminous efficiency of ReVelle and Ceplecha (2002) to compute bolide luminosity. In addition we also introduce the concept of the differential and integral acoustic/infrasonic efficiency and generalized it to the case of mechanical wave efficiency including internal atmospheric gravity waves generated during entry. Unlike the other efficiencies which are assumed to be a constant multiple of the luminous efficiency, the acoustic efficiency is calculated independently using a “first principles” approach. All of these topics have been pursued using either a homogeneous or a porous meteoroid model with great success. As a direct result, porosity seems to be a rather good possibility for explaining anomalous meteoroid behavior in the atmosphere.

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