The Influence of the Asymptotic Regime on the RS-IMEX

The Influence of the Asymptotic Regime on the RS-IMEX
复制标题

渐近状态对 RS-IMEX 的影响

DOI:
10.1007/978-3-319-63082-3_7
复制
发表时间:
2017
期刊:
European Consortium for Mathematics in Industry
影响因子:
--
通讯作者:
Jochen Schütz
Jochen Schütz
中科院分区:
--
文献类型:
--
作者:
Klaus Kaiser;Jochen Schütz

文献摘要

参考文献

相似文献

在这项工作中,我们研究了一种新的隐式-显式分裂的性能和极限(Kaiser和Schütz,弱可压缩流的高阶方法。Commun. Comput. 22(4):1150-1174,2017)用于有效处理奇摄动ODE。我们考虑一个奇摄动常微分方程,根据初始条件的选择,未扰动方程不一定准确地描述扰动的行为。对于Kaiser和Schütz提出的分裂,(弱可压缩流的高阶方法。Commun. Comput. 22(4):1150-1174,2017),这具有巨大的影响,因为它明确取决于未扰动方程的解。这确实构成了一个问题,数字显示,但也提出了使用“正确的”渐近的补救措施。一个完全隐式和一个标准的隐式显式分裂的比较。
In this work, we investigate the performance and explore the limits of a novel implicit-explicit splitting (Kaiser and Schütz, A high-order method for weakly compressible flows. Commun. Comput. Phys. 22(4): 1150–1174, 2017) for the efficient treatment of singularly perturbed ODEs. We consider a singularly perturbed ODE where, based on the choice of initial conditions, the unperturbed equation does not necessarily describe the behavior of the perturbed one accurately. For the splitting presented in Kaiser and Schütz, (A high-order method for weakly compressible flows. Commun. Comput. Phys. 22(4): 1150–1174, 2017), this has a tremendous influence as it explicitly depends on the solution to the unperturbed equation. That this indeed poses a problem is shown numerically; but also the remedy of using the ‘correct’ asymptotics is presented. Comparisons with a fully implicit and a standard implicit-explicit splitting are shown.
DOI: 10.4208/cicp.oa-2017-0028
发表时间: 2017-10
影响因子: 3.7
作者:
K. Kaiser;J. Schütz
通讯作者: K. Kaiser;J. Schütz