Equivalence between the DPG method and the exponential integrators for linear parabolic problems
Equivalence between the DPG method and the exponential integrators for linear parabolic problems
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DPG 方法与线性抛物线问题的指数积分器之间的等价
DOI:
10.1016/j.jcp.2020.110016
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发表时间:
2021
影响因子:
4.1
通讯作者:
Demkowicz, L.
中科院分区:
文献类型:
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作者:
Munoz-Matute, J.;Pardo, D.;Demkowicz, L.
The Discontinuous Petrov-Galerkin (DPG) method and the exponential integrators are two well established numerical methods for solving Partial Differential Equations (PDEs) and stiff systems of Ordinary Differential Equations (ODEs), respectively. In this work, we apply the DPG method in the time variable for linear parabolic problems and we calculate the optimal test functions analytically. We show that the DPG method in time is equivalent to exponential integrators for the trace variables, which are decoupled from the interior variables. In addition, the DPG optimal test functions allow us to compute the approximated solutions in the time element interiors. This DPG method in time allows to construct a posteriori error estimations in order to perform adaptivity. We generalize this novel DPG-based time-marching scheme to general first order linear systems of ODEs. We show the performance of the proposed method for 1D and 2D + time linear parabolic PDEs after discretizing in space by the finite element method.
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DOI:
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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:
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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
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Jay Gopalakrishnan;Paulina Sepúlveda
通讯作者:
Paulina Sepúlveda
影响因子:
3.1
作者:
Al-Mohy, Awad H.;Higham, Nicholas J.
通讯作者:
Higham, Nicholas J.
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
L. Demkowicz;Jay Gopalakrishnan
通讯作者:
Jay Gopalakrishnan