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

Wakana Iwakami, N. Ohnishi, K. Kotake, Shoichi Yamada, K. Sawada

    Research output: Contribution to journalArticle

    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

    Fingerprint

    dimensional analysis
    supernovae
    shock
    shock waves
    viscosity
    explosions
    mesh
    grids
    tensors
    geometry

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Numerical methods for three-dimensional analysis of shock instability in supernova cores. / Iwakami, Wakana; Ohnishi, N.; Kotake, K.; Yamada, Shoichi; Sawada, K.

    In: Journal of Physics: Conference Series, Vol. 112, No. Part 4, 042021, 12.06.2008.

    Research output: Contribution to journalArticle

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    AU - Ohnishi, N.

    AU - Kotake, K.

    AU - Yamada, Shoichi

    AU - Sawada, K.

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