Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Warsa, James S."'
Second Moment Methods (SMMs) are developed that are consistent with the Discontinuous Galerkin (DG) spatial discretization of the discrete ordinates (or \Sn) transport equations. The low-order (LO) diffusion system of equations is discretized with fu
Externí odkaz:
http://arxiv.org/abs/2404.17473
In this paper, new implicit methods with reduced memory are developed for solving the time-dependent Boltzmann transport equation (BTE). One-group transport problems in 1D slab geometry are considered. The reduced-memory methods are formulated for th
Externí odkaz:
http://arxiv.org/abs/2305.08983
This paper presents multilevel iterative schemes for solving the multigroup Boltzmann transport equations (BTEs) with parallel calculation of group equations. They are formulated with multigroup and grey low-order equations of the Second-Moment (SM)
Externí odkaz:
http://arxiv.org/abs/2102.09054
Autor:
Fryer, Chris L., Fontes, Christopher J., Warsa, James S., Roming, Pete W. A., Coffing, Shane X., Wood, Suzannah R.
The breakout of a supernova blast wave from its progenitor star provides strong constraints on the star and its immediate surroundings. These surroundings are shaped by mass loss from the star and can include a wide variety of inhomogeneities. Here w
Externí odkaz:
http://arxiv.org/abs/2005.12177
Acceleration of the Sn Equations with Highly Anisotropic Scattering using the Fokker-Planck Equation
The discrete ordinates method can model forward-peaked transport problems accurately. However, convergence of discrete ordinates solution can become arbitrarily slow upon use of standard iterative procedures like source iteration and GMRES. Standard
Externí odkaz:
http://arxiv.org/abs/1907.13013
Publikováno v:
In Annals of Nuclear Energy November 2020 147
Publikováno v:
In Journal of Computational Physics 1 January 2020 400
We compare variants of Anderson Mixing with the Jacobian-Free Newton-Krylov and Broyden methods applied to an instance of the k-eigenvalue formulation of the linear Boltzmann transport equation. We present evidence that one variant of Anderson Mixing
Externí odkaz:
http://arxiv.org/abs/1112.3568
Publikováno v:
In Journal of Computational Physics 1 November 2018 372:931-955
Publikováno v:
In Journal of Computational Physics 1 April 2013 238:188-209