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

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

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号042021
ジャーナルJournal of Physics: Conference Series
112
Part 4
DOI
出版ステータスPublished - 2008 6 12
イベント5th International Conference on Inertial Fusion Sciences and Applications, IFSA 2007 - Kobe, Japan
継続期間: 2007 9 92007 9 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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