Exponential time-differencing with embedded Runge-Kutta adaptive step control

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We have presented the first embedded Runge-Kutta exponential time-differencing (RKETD) methods of fourth order with third order embedding and fifth order with third order embedding for non-Rosenbrock type nonlinear systems. A procedure for constructing RKETD methods that accounts for both order conditions and stability is outlined. In our stability analysis, the fast time scale is represented by a full linear operator in contrast to particular scalar cases considered before. An effective time-stepping strategy based on reducing both ETD function evaluations and rejected steps is described. Comparisons of performance with adaptive-stepping integrating factor (IF) are carried out on a set of canonical partial differential equations: the shock-fronts of Burgers equation, interacting KdV solitons, KS controlled chaos, and critical collapse of two-dimensional NLS.

Original languageEnglish (US)
Pages (from-to)579-601
Number of pages23
JournalJournal of Computational Physics
Volume280
DOIs
StatePublished - Jan 1 2015

Keywords

  • Burgers
  • ETD
  • Embedded Runge-Kutta
  • Exponential time-differencing
  • KdV
  • NLS

ASJC Scopus subject areas

  • Numerical Analysis
  • Modeling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

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