Efficient High-Order Space-Angle-Energy Polytopic Discontinuous Galerkin Finite Element Methods for Linear Boltzmann Transport
Efficient High-Order Space-Angle-Energy Polytopic Discontinuous Galerkin Finite Element Methods for Linear Boltzmann Transport
复制标题
线性玻尔兹曼输运的高效高阶空间角能量多面不连续伽辽金有限元方法
DOI:
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Richard S.J. Widdowson
中科院分区:
文献类型:
--
作者:
P. Houston;M. Hubbard;Thomas J. Radley;Oliver J. Sutton;Richard S.J. Widdowson
We introduce an $hp$-version discontinuous Galerkin finite element method (DGFEM) for the linear Boltzmann transport problem. A key feature of this new method is that, while offering arbitrary order convergence rates, it may be implemented in an almost identical form to standard multigroup discrete ordinates methods, meaning that solutions can be computed efficiently with high accuracy and in parallel within existing software. This method provides a unified discretisation of the space, angle, and energy domains of the underlying integro-differential equation and naturally incorporates both local mesh and local polynomial degree variation within each of these computational domains. Moreover, general polytopic elements can be handled by the method, enabling efficient discretisations of problems posed on complicated spatial geometries. We study the stability and $hp$-version a priori error analysis of the proposed method, by deriving suitable $hp$-approximation estimates together with a novel inf-sup bound. Numerical experiments highlighting the performance of the method for both polyenergetic and monoenergetic problems are presented.
影响因子:
2
作者:
Antonietti P
通讯作者:
Antonietti P
影响因子:
14.2
作者:
Dziuk, Gerhard;Elliott, Charles M.
通讯作者:
Elliott, Charles M.
影响因子:
2.9
作者:
Antonietti, Paola F.;Dedner, Andreas;Verani, Marco
通讯作者:
Verani, Marco