SASI in a Spinning Star

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Project Details

Results

Hydrodynamics Code

• MVH-1, a PPMLR code using slab decomposition and MPI for parallel communications
• 400 (logarithmically spaced) radial zones by 400 angular zones
• angular grid extends from 0 to 2pi, radial grid from 0.2 to 3.0 (shock at 1.0)
• explicit conservation of angular momentum
• explicit conservation of total energy by including gravitational potential
• dissipation at stationary shock front to minimize numerical noise

Initial Conditions

• Highly supersonic infall at constant mass accretion rate from outer boundary
• reflecting boundary at inner radius (stellar surface)
• 'optically thin' cooling parameterized by alpha=1.5, beta=2.5
• strength of cooling is adjusted to place the steady-state shock at a radius of 1.0
• uniform specific angular momentum throughout initial flow and at outer boundary

Diagnostics