Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005p%26ss...53.1205s&link_type=abstract
Planetary and Space Science, Volume 53, Issue 12, p. 1205-1220.
Physics
4
Scientific paper
Vertical impacts on the Earth of asteroids 500 3000 km in diameter at 15 km/s have been numerically modelled using the hydrodynamic SOVA code. This code has been modified for the spherical system of coordinates well suited for simulations of very large impacts when the entire Earth is involved in motion. The simulations include cratering process, upward motion of deep mantle layers, fall of ejecta on the Earth, escape of matter to space, and formation of rock vapour atmospheres. The calculations were made for the period preceding disappearance of rock vapour atmospheres caused by radiation several years after the largest impacts. For very large vertical impacts at 15 km/s, escaping masses proved to be negligibly small. Quantities of kinetic, internal, potential, and radiated away energies are obtained as functions of time and space. After the impacts, a global layer of condensed ejecta covers the whole of the Earth's surface and the ejecta energy is sufficient to vaporise an ocean 3 km deep. The mass of rock vapour atmosphere is 10 23% of the impactor mass. This atmosphere has a greater mass than the water atmosphere if impactor is 2000 km in diameter or larger.
No associations
LandOfFree
Numerical simulations of very large impacts on the Earth does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Numerical simulations of very large impacts on the Earth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical simulations of very large impacts on the Earth will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1656727