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The University of Tennessee

University of Tennessee | Department of Physics and Astronomy | Theoretical Astrophysic Group

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GenASiS: AMR code for True 2D/3D Neutrino Transport

To study the mechanism of core-collapse supernova with true 2D/3D neutrino transport, we are developing a new adaptive mesh refinement (AMR) code that couples six-dimensional (three space, three momentum space) special relativistic Boltzmann neutrino transport to three-dimensional special relativistic magnetohydrodynamics, Newtonian self gravity, a nuclear equation of state, and state of the art neutrino opacities.

This code—called GenASiS, for General Astrophysical Simulation System—is designed for modularity and extensibility of the physics. Presently in use or under development are capabilities for Newtonian self-gravity, Newtonian and special relativistic magnetohydrodynamics (with ‘realistic’ equation of state), and special relativistic energy- and angle-dependent neutrino transport—including full treatment of the energy and angle dependence of scattering and pair interactions. Early version of GenASiS' neutrino transport solvers have been subjected to almost every transport test problem we can find in the literature, including some we fashioned.

Written in Fortran 95 and designed with object-oriented paradigm, GenASiS is still currently under heavy development.