This contribution focuses on the numerical analysis of large meteoroids during their entry into Earth atmosphere. After a survey of the available flight data, two entries of meteoroids have been reconstructed: the Chelyabinsk event that occurred in 2013, and a meteor, which felt in the Atlantic Ocean in February 2016, the Saint-Valentine day. For both meteoroids, the most likely trajectories...
We have modeled hypervelocity high-temperature flows in the 8--25 km/s range, considering a gas mixture of 15 species (\ce{N2}, \ce{O2}, \ce{NO}, \ce{N2+}, \ce{O2+}, \ce{NO+}, \ce{N}, \ce{O}, \ce{N+}, \ce{O+}, \ce{N++}, \ce{O++}, \ce{N+++}, \ce{O+++}, \ce{e-}). Atomic and molecular species internal levels spectroscopic data was compiled, with reconstruction of molecular potential curves and...
Observation missions of meteoroids entering the Earth’s atmosphere are conducted regularly. Meanwhile a method to replicate the flight in a ground test facilities has been established. Numerical simulations with subsequent comparison of the spectroscopic data, on the other hand, are not yet widely used in this field. This is mainly due to the complex flow environment which not only includes...
Meteoroids are interplanetary rocky objects that can reach entry velocities into the Earth atmosphere up to 72 km/s, leading to a high temperature field around the body, ablating the meteoroid material and triggering a chain of chemical and radiative processes. These physico-chemical phenomena result in the formation of a visible plasma flow around the meteoroid head and along its trail, whose...
