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 language | English (US) |
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Pages (from-to) | 539-565 |
Number of pages | 27 |
Journal | Astrophysical Journal, Supplement Series |
Volume | 143 |
Issue number | 2 |
DOIs | |
State | Published - Dec 2002 |
Externally published | Yes |
Keywords
- Hydrodynamics
- Methods: Numerical
- Stellar dynamics
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science