Hybrid Multi-level solvers for discontinuous Galerkin finite element discrete ordinate diffusion synthetic acceleration of radiation transport algorithms

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• 作者：B. O&rsquo ; Malley^a ; ^{bo712@ic.ac.uk} ; J. Kó ; phá ; zi^a ; R.P. Smedley-Stevenson^b ; M.D. Eaton^a
• 关键词：Diffusion ; Multilevel solver ; Multigrid ; Discontinuous galerkin ; Finite element method ; DG-FEM ; Interior penalty ; Diffusion synthetic acceleration ; DSA
• 刊名：Annals of Nuclear Energy
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：102
• 期：Complete
• 页码：134-147
• 全文大小：1135 K
• 卷排序：102

文摘

Two preconditioners to accelerate MIP forumlation of DG-FEM diffusion. First method projects from linear discontinuous to linear continuous space. First method projects from linear discontinuous to constant discontinuous space. Used in combination with various AMG algorithms for low-level correction. Various AMG methods used to provide performance benchmarks.