A New Class of High-Order Methods for Multirate Differential Equations
A New Class of High-Order Methods for Multirate Differential Equations
复制标题
一类新的多率微分方程高阶方法
DOI:
10.1137/19m125621x
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
D. Reynolds
中科院分区:
文献类型:
--
作者:
Vu Thai Luan;Rujeko Chinomona;D. Reynolds
This work focuses on the development of a new class of high-order accurate methods for multirate time integration of systems of ordinary differential equations. The proposed methods are based on a specific subset of explicit one-step exponential integrators. More precisely, starting from an explicit exponential Runge--Kutta method of the appropriate form, we derive a multirate algorithm to approximate the action of the matrix exponential through the definition of modified "fast" initial-value problems. These fast problems may be solved using any viable solver, enabling multirate simulations through use of a subcycled method. Due to this structure, we name these Multirate Exponential Runge--Kutta (MERK) methods. In addition to showing how MERK methods may be derived, we provide rigorous convergence analysis, showing that for an overall method of order $p$, the fast problems corresponding to internal stages may be solved using a method of order $p-1$, while the final fast problem corresponding to the time-evolved solution must use a method of order $p$. Numerical simulations are then provided to demonstrate the convergence and efficiency of MERK methods with orders three through five on a series of multirate test problems.
DOI:
10.1016/j.jcp.2015.01.018
发表时间:
2015
期刊:
J. Comput. Phys.
影响因子:
--
作者:
A. Demirel;J. Niegemann;K. Busch;M. Hochbruck
通讯作者:
M. Hochbruck