High-fidelity simulation offers insight into 2013 Chelyabinsk meteor Livermore_Lab
A decade later, scientists from the Lawrence Livermore National Laboratory Planetary Defense program are releasing details of their research of the airburst event. The team has spent the last three years modeling and simulating the atmospheric breakup of the Chelyabinsk meteor.
"Our research underlines the importance of using these types of high-fidelity models to understand asteroid airburst events," Pearl said."A lot of smaller asteroids are rubble piles, or loosely bound collections of space gravel, so the possibility of a monolith is really interesting." The breakup process is physics-rich, explained LLNL physicist Mike Owen. The coupling of the asteroid to the atmosphere depends on how much surface area it has. The greater the surface area, the more exposure the object has to heat, stress and pressure.
A better understanding of the breakup process can be used to build better statistical models of the risk posed by asteroids in the Chelyabinsk-size class. Understanding how these objects break up and transfer their energy into the atmosphere is crucial in providing a good estimate of the damage they may cause and can be used to better inform civil-defense strategies, said LLNL's Cody Raskin, a key contributor to the project.
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