Physics
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..957m&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 957.
Physics
1
Jet Flow, Mars Surface, Chondrule, Meteorites, Hypervelocity Impact, Equations Of State, Tektites
Scientific paper
When materials collide obliquely a jet may for whose velocity and peak pressure-temperature conditions greatly exceed those that would occur in a plane impact with the same velocity. Jetting has been proposed as a mechanism for the formation of certain chondrules, the formation of tektites, and it has been suggested that jetting played a role in the formation of the moon in a giant impact and in the ejection of the SNC meteorites off the Martian surface. An experimentally verified theory exists for the symmetric collision of thin plates that describes the conditions under which jets form, and gives the mass and momentum fluxes of the jets. The entire theory does not apply to asymmetric collisions, thick plates, or spheres. Experiments involving asymmetric collisions of thin and thick plates give very poor agreement with thin plate theory. It has been argued, based on thin plate theory, that jets formed when spheres collide ought to contain both impactor and target materials. Here, a new theory is presented that argues for common conditions leading to single material jets. Preliminary experiments aimed at testing this theory are presented.
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