Two-Dimensional Simulation of Hydrodynamic Instability in Supernova Explosions

Details Two-Dimensional Simulation of Hydrodynamic Instability in Supernova Explosions Two-Dimensional Simulation of Hydrodynamic Instability in Supernova Explosions

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pthph..83..723d&link_type=abstract

Progress of Theoretical Physics, Vol. 83, No. 4, pp. 723-732

Physics

18

Scientific paper

We investigate the growth of the hydrodynamic instability in supernova explosion by two-dimensional numerical calculations. The interfaces between the zones with different chemical compositions in the progenitor are expected to be Rayleigh-Taylor unstable and to cause mixing. The location, amplitude and types of initial perturbations may affect the extent to mixing. We study the relation between the extent of mixing and the initial perturbation, especially the location and amplitude of seeds. A 5% velocity perturbation added at and inside the hydrogen/helium (H/He) interface leads to mixing of material but the same perturbation added at and inside the helium/heavy elements (He/C+O) interface does not. A perturbation with much larger amplitude is needed at the inner interface to cause mixing. Thus our results show that the extent of the mixing depends strongly on the amplitude and the location of the initial perturbation.

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