Numerical methods for three-dimensional analysis of shock instability in supernova cores

W. Iwakami, N. Ohnishi, K. Kotake, S. Yamada, K. Sawada

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We studied the standing accretion shock instability (SASI) for a core-collapse supernova explosion. SASI induces a nonspherically symmetric motion of a standing spherical shock wave. In order to investigate the growth of SASI, we solved the three-dimensional compressible Euler equations using ZEUS-MP/2 code based on the finite-difference method with a staggered mesh of spherical polar geometry. Although the von Neumann and Richtmyer artificial viscosity is used in ZEUS-MP/2 code to capture shock waves, we propose utilizing a tensor artificial viscosity in order to overcome the numerical instability regarded as the carbuncle phenomenon. This numerical instability emerges around the grid polar axis and precludes mode analysis of SASI.

Original languageEnglish
Article number042021
JournalJournal of Physics: Conference Series
Volume112
Issue numberPart 4
DOIs
Publication statusPublished - 2008 Jun 12
Event5th International Conference on Inertial Fusion Sciences and Applications, IFSA 2007 - Kobe, Japan
Duration: 2007 Sep 92007 Sep 14

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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