MultiLevel Local Time-Stepping Methods of Runge-Kutta-type for Wave Equations
MultiLevel Local Time-Stepping Methods of Runge-Kutta-type for Wave Equations
复制标题
波动方程龙格-库塔型多级局部时间步进方法
DOI:
10.1137/16m1084407
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Michaela Mehlin
中科院分区:
文献类型:
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作者:
M. Almquist;Michaela Mehlin
Local mesh refinement significantly influences the performance of explicit time-stepping methods for numerical wave propagation. Local time-stepping (LTS) methods improve the efficiency by using smaller time steps precisely where the smallest mesh elements are located, thus permitting a larger time step in the coarser regions of the mesh without violating the stability condition. However, when the mesh contains nested patches of refinement, any local time step will be unnecessarily small in some regions. To allow for an appropriate time step at each level of mesh refinement, multilevel local time-stepping (MLTS) methods have been proposed. Starting from the Runge--Kutta-based LTS methods derived by Grote, Mehlin, and Mitkova [SIAM J. Sci. Comput., 37 (2015), pp. A747--A775], we propose explicit MLTS methods of arbitrarily high accuracy. Numerical experiments with finite difference and continuous finite element spatial discretizations illustrate the usefulness of the novel MLTS methods and show that they r...
DOI:
10.1016/j.jcp.2015.01.018
发表时间:
2015
期刊:
J. Comput. Phys.
影响因子:
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作者:
A. Demirel;J. Niegemann;K. Busch;M. Hochbruck
通讯作者:
M. Hochbruck
DOI:
10.1137/15m1038037
发表时间:
2015
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
M. Hochbruck;A. Sturm
通讯作者:
A. Sturm