On stability and conservation properties of (S)epirk integrators in the context of discretized pdes

On stability and conservation properties of (S)epirk integrators in the context of discretized pdes
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离散偏微分方程背景下 (S)epirk 积分器的稳定性和守恒性质

DOI:
10.1007/978-3-319-91548-7_46
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Andreas Meister
Andreas Meister
中科院分区:
--
文献类型:
--
作者:
Veronika Straub;Sigrun Ortleb;Philipp Birken;Andreas Meister

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指数积分器因其能精确求解系统的线性部分并具有A-稳定性而在高维刚性问题中越来越受欢迎。然而,在实践中,指数积分器是使用涉及矩阵指数的函数(所谓的函数)的矩阵向量乘积的近似技术来实现的,以使它们有效且与其他最先进的方案竞争。我们将考察线性稳定性,给出一类特殊的指数积分格式EPIRK和sEPIRK的Courant-Friedrichs-Lewis(CFL)条件,并证明它们对嵌入逼近技术参数的依赖性。此外,证明了EPIRK格式的守恒性。
Exponential integrators are becoming increasingly popular for stiff problems of high dimension due to their attractive property of solving the linear part of the system exactly and hence being A-stable. In practice, however, exponential integrators are implemented using approximation techniques to matrix-vector products involving functions of the matrix exponential (the so-called-functions) to make them efficient and competitive to other state-of-the-art schemes. We will examine linear stability and provide a Courant–Friedrichs–Lewy (CFL) condition of special classes of exponential integrator schemes called EPIRK and sEPIRK and demonstrate their dependence on the parameters of the embedded approximation technique. Furthermore, a conservation property of the EPIRK schemes is proven.
使用指数积分器对 IMEX 类型进行高效时间积分,进行可压缩粘性流模拟
DOI: 10.1002/pamm.201610422
发表时间: 2016
期刊: PAMM
影响因子: --
作者:
Veronika Straub;Sigrun Ortleb;Philipp Birken;Andreas Meister
通讯作者: Andreas Meister
一类新的 Runge-Kutta 型指数传播迭代方法 (EPIRK)
DOI: --
发表时间: 2011
影响因子: 4.1
作者:
M. Tokman
通讯作者: M. Tokman