A DPG-based time-marching scheme for linear hyperbolic problems
A DPG-based time-marching scheme for linear hyperbolic problems
复制标题
基于 DPG 的线性双曲问题时间推进方案
DOI:
10.1016/j.cma.2020.113539
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发表时间:
2021
影响因子:
7.2
通讯作者:
Demkowicz, Leszek
中科院分区:
文献类型:
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作者:
Muñoz-Matute, Judit;Pardo, David;Demkowicz, Leszek
The Discontinuous Petrov–Galerkin (DPG) method is a widely employed discretization method for Partial Differential Equations (PDEs). In a recent work, we applied the DPG method with optimal test functions for the time integration of transient parabolic PDEs. We showed that the resulting DPG-based time-marching scheme is equivalent to exponential integrators for the trace variables. In this work, we extend the aforementioned method to time-dependent hyperbolic PDEs. For that, we reduce the second order system in time to first order and we calculate the optimal testing analytically. We also relate our method with exponential integrators of Gautschi-type. Finally, we validate our method for 1D/2D + time linear wave equation after semidiscretization in space with a standard Bubnov–Galerkin method. The presented DPG-based time integrator provides expressions for the solution in the element interiors in addition to those on the traces. This allows to design different error estimators to perform adaptivity.
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DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Truman Ellis;Jesse Chan;L. Demkowicz
通讯作者:
L. Demkowicz
DOI:
--
发表时间:
2016
期刊:
Comput. Methods Appl. Math.
影响因子:
--
作者:
T. Führer;N. Heuer;J. S. Gupta
通讯作者:
J. S. Gupta
影响因子:
3.1
作者:
Awad H. Al
通讯作者:
Awad H. Al
DOI:
10.1137/140973979
发表时间:
2015-02
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
Awad H. Al-Mohy;N. Higham;S. Relton
通讯作者:
Awad H. Al-Mohy;N. Higham;S. Relton
影响因子:
1.5
作者:
Aprahamian M
通讯作者:
Aprahamian M