The Discontinuous Galerkin Time Domain (DGTD) methods are now popular for the solution of wave propagation problems. Able to deal with unstructured, possibly locally-refined meshes, they handle easily complex geometries and remain fully explicit with easy parallelization and extension to high orders of accuracy. Non-dissipative versions exist, where some discrete electromagnetic energy is exactly conserved. However, the stability limit of the methods, related to the smallest elements in the mesh, calls for the construction of local-time stepping algorithms. These schemes have already been developed for -body mechanical problems and are known as symplectic schemes. They are applied here to DGTD methods on wave propagation problems.
Mots-clés : waves, acoustics, Maxwell's system, discontinuous Galerkin methods, symplectic schemes, energy conservation, second-order accuracy
@article{M2AN_2006__40_5_815_0,
author = {Piperno, Serge},
title = {Symplectic local time-stepping in non-dissipative {DGTD} methods applied to wave propagation problems},
journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
pages = {815--841},
publisher = {EDP-Sciences},
volume = {40},
number = {5},
year = {2006},
doi = {10.1051/m2an:2006035},
mrnumber = {2293248},
zbl = {1121.78014},
language = {en},
url = {http://www.numdam.org/articles/10.1051/m2an:2006035/}
}
TY - JOUR AU - Piperno, Serge TI - Symplectic local time-stepping in non-dissipative DGTD methods applied to wave propagation problems JO - ESAIM: Modélisation mathématique et analyse numérique PY - 2006 SP - 815 EP - 841 VL - 40 IS - 5 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an:2006035/ DO - 10.1051/m2an:2006035 LA - en ID - M2AN_2006__40_5_815_0 ER -
%0 Journal Article %A Piperno, Serge %T Symplectic local time-stepping in non-dissipative DGTD methods applied to wave propagation problems %J ESAIM: Modélisation mathématique et analyse numérique %D 2006 %P 815-841 %V 40 %N 5 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an:2006035/ %R 10.1051/m2an:2006035 %G en %F M2AN_2006__40_5_815_0
Piperno, Serge. Symplectic local time-stepping in non-dissipative DGTD methods applied to wave propagation problems. ESAIM: Modélisation mathématique et analyse numérique, Tome 40 (2006) no. 5, pp. 815-841. doi : 10.1051/m2an:2006035. http://www.numdam.org/articles/10.1051/m2an:2006035/
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