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End-to-End Numerical Simulation of a Bolide’s Reentry, Impact, Cratering, Fireball and Cloud Generation: Local and Global Consequences

Description: 

Simulations of a 1 to 2 km bolide striking Earth on solid ground and on ocean waters have been conducted. Models include hydrostatic equilibrium profiles of temperature, pressure, and densities for atmosphere and ocean, in order to accurately predict impact consequences. Phase changes, such as melting and vaporization, combined with the material’s tensile, shear, and compressive strength responses, under high temperature and high strain conditions, along with anisotropic responses, are considered in greater detail than previous work. Our simulations illustrate the erosion of the bolide and the creation of a dusty tail, the breakup of the bolide into fragments, the erosion of some of the fragments, and the survival of others. The reentry of fragments into the stratosphere and their flattening is also demonstrated. For the first time, we present results of an integrated simulation of water and ground impact, the resulting crater formation, fireball evolution and cloud generation and transport of dust and debris to hundreds of kilometers from the impact site. We illustrate the seismo-acoustic signature of the asteroid impacting Earth. Computations were conducted on LLNL HPC using SME++ framework developed last 7 years.

Session: Detecting, Locating, Characterizing and Monitoring Non-earthquake Seismoacoustic Sources

Type: Oral

Date: 4/19/2023

Presentation Time: 02:15 PM (local time)

Presenting Author: Souheil M. Ezzedine

Student Presenter: No

Invited Presentation: 

Authors