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a test of the comet hypothesis of the tunguska meteor fall - nature of the meteor 'thermal' explosion paradoxThe hypothesis that a comet was responsible for the Tunguska Meteor Fall is rejected because the hypothesis does not seem to account for the intense terminal spherical shock. A porous meteoroid model is proposed, and an analysis indicates that an entity of this type might produce an aerodynamic heat flux large enough to account for the terminal meteor explosion. It is suggested that the presence of olivine and of highly irregular macrostructure in meteors might indicate the presence of some porosity. For a highly porous meteoroid, it is postulated that during entry into the atmosphere the aerodynamic heat transfer at its external or pore walls would become so intensified as to cause either complete ablation with popping or a solid-liquid-vapor phase transition accompanied by an explosion.
Document ID
19780050213
Document Type
Reprint (Version printed in journal)
Authors
Liu, V. C.
(Michigan, University Ann Arbor, Mich., United States)
Date Acquired
August 9, 2013
Publication Date
April 1, 1978
Publication Information
Publication: Geophysical Research Letters
Volume: 5
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NGR-23-005-094
Distribution Limits
Public
Copyright
Other