EPIRK-W and EPIRK-K Time Discretization Methods
EPIRK-W and EPIRK-K Time Discretization Methods
复制标题
EPIRK-W 和 EPIRK-K 时间离散化方法
DOI:
10.1007/s10915-018-0761-3
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发表时间:
2018
影响因子:
2.5
通讯作者:
Tokman, Mayya
中科院分区:
文献类型:
--
作者:
Narayanamurthi, Mahesh;Tranquilli, Paul;Sandu, Adrian;Tokman, Mayya
Exponential integrators are special time discretization methods where the traditional linear system solves used by implicit schemes are replaced with computing the action of matrix exponential-like functions on a vector. A very general formulation of exponential integrators is offered by the Exponential Propagation Iterative methods of Runge–Kutta type (EPIRK) family of schemes. The use of Jacobian approximations is an important strategy to drastically reduce the overall computational costs of implicit schemes while maintaining the quality of their solutions. This paper extends the EPIRK class to allow the use of inexact Jacobians as arguments of the matrix exponential-like functions. Specifically, we develop two new families of methods: EPIRK-Wintegrators that can accommodate any approximation of the Jacobian, and EPIRK-Kintegrators that rely on a specific Krylov-subspace projection of the exact Jacobian. Classical order conditions theories are constructed for these families. Practical EPIRK-Wmethods of order three and EPIRK-Kmethods of order four are developed. Numerical experiments indicate that the methods proposed herein are computationally favorable when compared to a representative state-of-the-art exponential integrator, and a Rosenbrock–Krylov integrator.
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DOI:
10.1016/j.jcp.2016.07.026
发表时间:
2016
期刊:
J. Comput. Phys.
影响因子:
--
作者:
Greg Rainwater;M. Tokman
通讯作者:
M. Tokman
DOI:
--
发表时间:
2015
期刊:
SIAM/ASA J. Uncertain. Quantification
影响因子:
--
作者:
Vishwas Rao;Adrian Sandu
通讯作者:
Adrian Sandu
DOI:
10.1137/s1064827597326651
发表时间:
1999
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
J. Verwer;E. Spee;J. Blom;W. Hundsdorfer
通讯作者:
W. Hundsdorfer
影响因子:
2.8
作者:
W. Heineken;G. Warnecke
通讯作者:
G. Warnecke
DOI:
10.1016/j.jcp.2014.08.013
发表时间:
2014
期刊:
ArXiv
影响因子:
--
作者:
P. Tranquilli;Adrian Sandu
通讯作者:
Adrian Sandu