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Astrophysics and Space Science

, Volume 59, Issue 2, pp 261–284 | Cite as

Neutrino transport in supernova models: A multigroup, flux limited diffusion scheme

  • Stephen W. Bruenn
  • J. Robert Buchler
  • William R. Yueh
Article

Abstract

A multigroup, diffusion scheme is derived from the Boltzmann equation for efficient numerical computation of neutrino transport in a collapsing stellar core. This scheme treats all neutrino scattering processes correctly with a Legendre expansion of the scattering rates. Modifications of the diffusion coefficient and the addition of a flux limiter extend the applicability of the scheme to neutrino transparent regimes and improve the agreement of the solution in both opaque and transparent regimes with those obtained analytically for some test problems. In addition, a more accurate treatment of the neutrino flowAcross shock discontinuities is developed through a shock matching condition. The solutions given by this multigroup, flux-limited diffusion scheme are compared with those of a modifiedS N code.

Keywords

Diffusion Coefficient Numerical Computation Test Problem Boltzmann Equation Limited Diffusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1978

Authors and Affiliations

  • Stephen W. Bruenn
    • 1
  • J. Robert Buchler
    • 2
  • William R. Yueh
    • 2
  1. 1.Physics Dept.Florida Atlantic UniversityBoca RatonUSA
  2. 2.Dept. of Physics and AstronomyUniversity of FloridaGainesvilleUSA

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