Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..467g&link_type=abstract
SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Radiative shocks might be encountered in various astrophysical systems. Therefore, there is a growing interest in producing radiative shocks in laboratory experiments as well as in modelling them with numerical simulations in order to calibrate and analyze the experiments.
We present both simulations and an experiment of radiative shocks in xenon cell at low pressure. We first present the results obtained by the radiative shock experiment held at the PALS laser (Prague) in November 2005, where for the first time, the propagation of the shock was recorded over a very long period (40 ns). We then present simulations of this experiment performed using the radiation-hydrodynamics code HERACLES. We have shown, using these simulations, that multi-dimensional lateral radiative losses are determinant for the propagation of the radiative precursor. Assuming a wall transmision of 60% allows to reproduce very well the propagation of the radiative precursor and also gives a good agreement on the transmission coefficient upstream and inside the precursor.
Audit Edouard
Busquet Michel
Gonzalez Martinez M.
Rus Bedrich
Stehlé Chantal
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