J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 453-456
Multi-dimensional radiative effects in supercritical shock wavesS. Leygnac1, 2, L. Boireau2, 3, C. Michaut2, T. Lanz2, 4, C. Stehlé2 and S. Bouquet3
1 School of Cosmic Physics, Dublin Institute for Advanced Studies, Ireland
2 Laboratoire de l'Univers et ses Théories, Observatoire de Paris, France
3 Département de Physique Théorique et Appliquée, CEA, Bruyères-Le-Châtel, France
4 Department of Astronomy, University of Maryland, USA
We investigate the structure of the radiation field generated in high Mach number shock waves (supercritical shock waves ) which have a finite extension R in the direction perpendicular to the shock wave propagation. A simple analytical model allows us to calculate how the radiation field decreases with R for a medium with an homogeneous radiation emission in volume. We then perform a 3D radiative transfer calculation of the radiation field created by a stationary shock wave, and compare the predicted radiative energy density and flux with 1D calculations. We find that the variation of the radiation field with R follows the trend given by the analytical calculation. Finally, we perform radiative-hydrodynamical calculations to investigate further the variation of the radiation field with R and to estimate the decrease of the velocity of the radiative precursor with R.
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