A mixed discontinuous Galerkin method for the wave equation
A mixed discontinuous Galerkin method for the wave equation
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DOI:
10.1016/j.camwa.2020.12.001
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Limin He;Fei Wang;Jing Wen
中科院分区:
文献类型:
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作者:
Limin He;Fei Wang;Jing Wen
We study a mixed discontinuous Galerkin (DG) method for solving the second-order wave equation. The stress variable p and the displacement variable u are discretized by the mixed DG element pair P k+ 1–P k (k≥ 0). Under appropriate regularity assumptions on the solution pair, we derive optimal error estimates for the spatially semi-discrete scheme. Specifically, we prove the optimal convergence orders for u in L 2 norm and p in L 2 norm. Some test problems are presented, and the numerical results show that the orders of convergence coincide with the predicted error estimates.