Energy-Based Discontinuous Galerkin Difference Methods for Second-Order Wave Equations
Energy-Based Discontinuous Galerkin Difference Methods for Second-Order Wave Equations
复制标题
基于能量的二阶波动方程间断伽辽金差分法
DOI:
10.1007/s42967-021-00149-y
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发表时间:
2021
影响因子:
1.6
通讯作者:
Hagstrom, Thomas
中科院分区:
文献类型:
--
作者:
Zhang, Lu;Appelö, Daniel;Hagstrom, Thomas
We combine the newly constructed Galerkin difference basis with the energy-based discontinuous Galerkin method for wave equations in second-order form. The approximation properties of the resulting method are excellent and the allowable time steps are large compared to traditional discontinuous Galerkin methods. The one drawback of the combined approach is the cost of inversion of the local mass matrix. We demonstrate that for constant coefficient problems on Cartesian meshes this bottleneck can be removed by the use of a modified Galerkin difference basis. For variable coefficients or non-Cartesian meshes this technique is not possible and we instead use the preconditioned conjugate gradient method to iteratively invert the mass matrices. With a careful choice of preconditioner we can demonstrate optimal complexity, albeit with a larger constant.
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影响因子:
3.1
作者:
Banks, J. W.;Buckner, B. Brett;Hagstrom, T.;Juhnke, K.
通讯作者:
Juhnke, K.
DOI:
--
发表时间:
1995
期刊:
TOMS
影响因子:
--
作者:
Mark T. Jones;P. Plassmann
通讯作者:
P. Plassmann
DOI:
10.1137/16m1089198
发表时间:
2016
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
Jesse Chan;Russell J. Hewett;T. Warburton
通讯作者:
T. Warburton
DOI:
10.1137/140973517
发表时间:
2015-12
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
D. Appelö;T. Hagstrom
通讯作者:
D. Appelö;T. Hagstrom
DOI:
10.1016/j.jcp.2019.04.031
发表时间:
2018
期刊:
J. Comput. Phys.
影响因子:
--
作者:
J. Kozdon;L. Wilcox;T. Hagstrom;J. Banks
通讯作者:
J. Banks