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Stage-local partitioned two-step runge-kutta methods for large systems of ordinary differential equations

Journal Article · · BIT Numerical Mathematics
We introduce stage-local partitioned two-step Runge-Kutta methods are an extension of standard two-step Runge-Kutta methods, which are an alternative to the standard additive two-step Runge-Kutta methods currently existing in the literature. Furthermore, these new schemes are designed with an eye towards truly N-partitioned systems and leverage local stage approximations to make several computationally interesting approximations viable. Specifically, the focus on local stage approximations makes possible the construction of truly asynchronous schemes, in the parallel sense, possible. In addition, we show that an implicit-explicit approach to these schemes can lead to methods that require the inversion of only local nonlinear systems.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
AC52-07NA27344; SC0023164
OSTI ID:
3010255
Report Number(s):
LLNL--JRNL-865529
Journal Information:
BIT Numerical Mathematics, Journal Name: BIT Numerical Mathematics Journal Issue: 4 Vol. 65; ISSN 0006-3835; ISSN 1572-9125
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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