9th International Workshop on Radiation of High Temperature Gases for Space Missions

Session

Meteorites

13 Sept 2022, 10:45

Auditório (Biblioteca Municipal - Santa Maria - Azores -Portugal)

72. CFD/Radiation analysis of the Chelyabinsk and St Valentine meteoroids

Dr Philippe Reynier (ISA)

13/09/2022, 10:55

Meteorites

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...

111. Modeling of Hypervelocity Air Flows Up to 25km/s

Mario Lino da Silva (Instituto de Plasmas e Fusão Nuclear - Instituto Superior Tecnico)

13/09/2022, 11:20

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...

94. DSMC simulation and spectral analysis of an iron meteorite at 80 km altitude entering Earth’s atmosphere

Mr Julian Beyer (University of Stuttgart)

13/09/2022, 11:45

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...

131. Simulation of meteor luminosity based on detailed flow simulations in the continuum and rarefied regimes

Prof. Thierry Magin (von Karman Institute for Fluid Dynamics)

13/09/2022, 12:10

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...

126. Meteorites

Thierry Magin