A Discontinuous Galerkin Method for Spectral Neutrino Transport
Abstract
We are developing methods for simulation of multi-dimensional neutrino transport in nuclear astrophysics applications (e.g., core-collapse supernovae and binary neutron star mergers). We aim to develop methods that are accurate and robust. Here we consider a multi-group two-moment model, where the spectral particle density θ and flux - angular moments of a phase space distribution function f - approximates the radiation field in a computationally tractable manner. Our approach is based on the Runge-Kutta discontinuous Galerkin method. Building on our previous work, we are developing a method that maintains realizable solutions in the sense that θ and remains consistent with moments of an underlying Fermi-Dirac distribution (satisfying 0 <= f <= 1). We present details of the physical model, the numerical method, and show preliminary numerical results.
US Department of Energy and National Science Foundation.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2018
- Bibcode:
- 2018APS..APRX11006E