An energy-based discontinuous Galerkin method with tame CFL numbers for the wave equation
An energy-based discontinuous Galerkin method with tame CFL numbers for the wave equation
复制标题
波动方程中具有温和 CFL 数的基于能量的间断伽辽金方法
DOI:
10.1007/s10543-023-00954-2
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发表时间:
2023
影响因子:
1.5
通讯作者:
Li, Fengyan
中科院分区:
文献类型:
--
作者:
Appelö, Daniel;Zhang, Lu;Hagstrom, Thomas;Li, Fengyan
We extend and analyze the energy-based discontinuous Galerkin method for second order wave equations on staggered and structured meshes. By combining spatial staggering with local time-stepping near boundaries, the method overcomes the typical numerical stiffness associated with high order piecewise polynomial approximations. In one space dimension with periodic boundary conditions and suitably chosen numerical fluxes, we prove bounds on the spatial operators that establish stability for CFL numbersindependent of order when stability-enhanced explicit time-stepping schemes of matching order are used. For problems on bounded domains and in higher dimensions we demonstrate numerically that one can march explicitly with large time steps at high order temporal and spatial accuracy.
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:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
D. Ketcheson;T. A. Kocsis;Lajos L'oczi
通讯作者:
Lajos L'oczi
影响因子:
2.4
作者:
P. Joly;Jerónimo Rodríguez
通讯作者:
Jerónimo Rodríguez