Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...296..418k&link_type=abstract
Astronomy and Astrophysics, v.296, p.418
Astronomy and Astrophysics
Astrophysics
4
Hydrodynamics, Shock Waves, Supernovae: General, Supernovae: Individual: Sn 1987A, Methods: Numerical
Scientific paper
The flux-vector splitting hydrodynamics code HYDRO, which solves the Euler equations of hydrodynamics for a general 1-D geometry on an adaptive grid, was extensively tested on the demanding pre-breakout supernova blast wave problem. Major improvements of the adaptive grid scheme and of the weighted-average second-order gradient selection scheme were required for the calculation. Tests with diffusion approximation sources and a comparison of pseudo-viscous shock smoothing with shock-gradient limiting were also performed. The techniques were applied to shock breakout in the type II supernova SN 1987A. The inclusion of an adaptive hydrodynamics grid was found to significantly enhance the accuracy of the hydrodynamic evolution, the post-shock temperature and the total UV emission. An easily customised REDUCE symbolic algebra interface was developed to write adaptive-grid, second-order, pseudoviscosity, and radiation-source scheme FORTRAN libraries for use with HYDRO.
Kelly R. C. D.
Korevaar Peter
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