Mapping initial hydrostatic models in godunov codes

M. Zlngale, L. J. Dursi, J. ZuHone, A. C. Calder, B. Fryxell, T. Plewa, J. W. Truran, A. Caceres, K. Olson, P. M. Ricker, K. Riley, R. Rosner, A. Siegel, F. X. Timmes, N. Vladimirova

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

We look in detail at the process of mapping an astrophysical initial model from a stellar evolution code onto the computational grid of an explicit, Godunov-type code while maintaining hydrostatic equilibrium. This mapping process is common in astrophysical simulations, when it is necessary to follow short-timescale dynamics after a period of long-timescale buildup. We look at the effects of spatial resolution, boundary conditions, the treatment of the gravitational source terms in the hydrodynamics solver, and the initialization process itself. We conclude with a summary detailing the mapping process that yields the lowest ambient velocities in the mapped model.

Original languageEnglish (US)
Pages (from-to)539-565
Number of pages27
JournalAstrophysical Journal, Supplement Series
Volume143
Issue number2
DOIs
StatePublished - Dec 1 2002

Keywords

  • Hydrodynamics
  • Methods: Numerical
  • Stellar dynamics

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Zlngale, M., Dursi, L. J., ZuHone, J., Calder, A. C., Fryxell, B., Plewa, T., Truran, J. W., Caceres, A., Olson, K., Ricker, P. M., Riley, K., Rosner, R., Siegel, A., Timmes, F. X., & Vladimirova, N. (2002). Mapping initial hydrostatic models in godunov codes. Astrophysical Journal, Supplement Series, 143(2), 539-565. https://doi.org/10.1086/342754