Scaling supernova hydrodynamics to the laboratory

Details Scaling supernova hydrodynamics to the laboratory Scaling supernova hydrodynamics to the laboratory

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stin...0214853k&link_type=abstract

Technical Report, DE2001-14944; UCRL-JC-132438

Computer Science

Hydrodynamics, Supernova 1987A, Taylor Instability, Cobalt Isotopes, Computer Programs

Scientific paper

Observations of SN1987A, a core collapse supernova (SN) in the Large Magellanic Cloud, strongly suggested the occurrence of material mixing driven by the Richtmyer-Meshkov (RM) and Rayleigh-Taylor (RT) instabilities. The "Bochum event" and early detection of radioactive Co-56 from the explosively burned oxygen layer implied that the Co-56 had been mixed well into the outer layers. Doppler broadening of the gamma-ray and optical lines from Co-56 implied velocities in excess of 3000 km/s whereas 2D modeling to date predicts maximum velocities of 5 2000 km/s, suggesting that perhaps 3D hydro effects should be considered. Given the fundamental role played by the RM and RT instabilities in SN evolution, it is desirable to develop the means of testing the hydrodynamics of the SN codes. We report here on experiments using the Nova laser at Lawrence Livermore National Laboratory (LLNL) to test the modeling of compressible RM and RT instabilities at relevant pressures. We use the SN code PROMETHEUS to model the experiment, and for comparison, the LLNL code CALE. We also present an analysis of the hydrodynamic growth in the experiment in terms of theory for incompressible hydrodynamic instabilities, and report on numerical investigations of 2D vs. 3D hydro differences in SN 1987A.

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