Efficient Time Integration of IMEX Type using Exponential Integrators for Compressible, Viscous Flow Simulation
Efficient Time Integration of IMEX Type using Exponential Integrators for Compressible, Viscous Flow Simulation
复制标题
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
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Andreas Meister
中科院分区:
文献类型:
--
作者:
Veronika Straub;Sigrun Ortleb;Philipp Birken;Andreas Meister
We investigate the adaption of the recently developed exponential integrators called EPIRK in the so‐called domain‐based implicit‐explicit (IMEX) setting of spatially discretized PDE's. The EPIRK schemes were shown to be efficient for sufficiently stiff problems and offer high precision and good stability properties like A‐ and L‐stability in theory. In practice, however, we can show that these stability properties are dependent on the parameters of the interior approximation techniques.Here, we introduce the IMEX‐EPIRK method, which consists of coupling an explicit Runge‐Kutta scheme with an EPIRK scheme. We briefly analyze its linear stability, show its conservation property and set up a CFL condition. Though the method is convergent of only first order, it demonstrates the advantages of this novel type of schemes for stiff problems very well. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
影响因子:
4.1
作者:
M. Tokman
通讯作者:
M. Tokman
影响因子:
2.8
作者:
M. Schlegel;O. Knoth;M. Arnold;R. Wolke
通讯作者:
R. Wolke