Computer Science – Numerical Analysis
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icbg.conf...10a&link_type=abstract
Impact Cratering: Bridging the Gap Between Modeling and Observations, February 7-9, 2003. LPI Contribution No. 1155. Houston,
Computer Science
Numerical Analysis
Numerical Analysis, Collisions, Comets, Craters, Ejecta, Computers, Gravitational Fields, Isotropy, Mathematical Models, Planetary Surfaces, Probability Theory, Projectiles, Sensitivity
Scientific paper
It is well known that impact events strike planetary surfaces at an angle from the surface. Assuming an isotropic flux of projectiles, probability theory indicates that the most likely angle of impact is 45 regardless of the body's gravitational field. While crater rims appear circular down to low impact angles, the distribution of ejecta around the crater is sensitive to the angle of impact and currently serves as the best guide to obliquity of impacts. A fair amount of numerical modeling of vertical impacts has been carried out from the early 60-s to the present time and references herein]. In vertical impacts, the axial symmetry of the process allows the simplification of the model to two dimensions (2D). Oblique impact modeling requires 3D hydro-codes and, hence, much more powerful computers. The first documented detailed oblique impact studies were carried out at Sandia National Labs' supercomputers less than 10 years ago to describe the 1994 collision of comet SL9 with Jupiter. Since then, substantial progress in computer science has made 3D modeling a reachable objective for the scientific community.
Artemieva Natalia
Pierazzo Elisabetta
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