A space-time DPG method for the wave equation in multiple dimensions

被引：8

作者：

Gopalakrishnan, Jay ^{[1
]}

Sepulveda, Paulina ^{[2
]}

机构：

[1] Portland State Univ, POB 751, Portland, OR 97207 USA

[2] Basque Ctr Appl Math, Mazarredo 14, E-48009 Bilbao, Spain

来源：

SPACE-TIME METHODS: APPLICATIONS TO PARTIAL DIFFERENTIAL EQUATIONS | 2019年 / 25卷

关键词：

time-dependent; wave equation; hyperbolic; discontinuous Petrov-Galerkin; finite element method; DISCRETIZATIONS;

D O I：

10.1515/9783110548488-004

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

A space-time discontinuous Petrov-Galerkin (DPG) method for the linear wave equation is presented. This method is based on a weak formulation that uses a broken graph space. The wellposedness of this formulation is established using a previously presented abstract framework. One of the main tasks in the verification of the conditions of this framework is proving a density result. This is done in detail for a simple domain in arbitrary dimensions. The DPG method based on the weak formulation is then studied theoretically and numerically. Error estimates and numerical results are presented for triangular, rectangular, tetrahedral, and hexahedral meshes of the space-time domain. The potential for using the built-in error estimator of the DPG method for an adaptive mesh refinement strategy in two and three dimensions is also presented.

引用

页码：117 / 139

页数：23

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[2]

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[3]

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