A discontinuous Galerkin method for linear symmetric hyperbolic systems in inhomogeneous media

被引:89
|
作者
Monk, P [1 ]
Richter, GR
机构
[1] Univ Delaware, Dept Math Sci, Newark, DE 19716 USA
[2] Rutgers State Univ, Dept Comp Sci, Piscataway, NJ 08854 USA
关键词
discontinuous Galerkin; finite elements; hyperbolic; explicit;
D O I
10.1007/s10915-004-4132-5
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The Discontinuous Galerkin (DG) method provides a powerful tool for approximating hyperbolic problems. Here we derive a new space-time DG method for linear time dependent hyperbolic problems written as a symmetric system (including the wave equation and Maxwells equations). The main features of the scheme are that it can handle inhomogeneous media, and can be time-stepped by solving a sequence of small linear systems resulting from applying the method on small collections of space-time elements. We show that the method is stable provided the space-time grid is appropriately constructed (this corresponds to the usual time-step restriction for explicit methods, but applied locally) and give an error analysis of the scheme. We also provide some simple numerical tests of the algorithm applied to the wave equation in two space dimensions (plus time).
引用
收藏
页码:443 / 477
页数:35
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