Efficient two-step Runge-Kutta methods for fluid dynamics simulations

Alejandro Figueroa, Zdzisław Jackiewicz, Rainald Löhner

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Explicit two-step Runge-Kutta (TSRK) methods offer an efficient alternative to traditional explicit Low-Storage Runge-Kutta (LSRK) schemes for solving the Navier-Stokes equations. A special class of TSRK methods that reduce requirement compared to previous TSRK schemes are derived. Schemes of fourth, fifth and sixth order are implemented and tested. The new schemes are evaluated with two common test cases, a 2D cylinder and a 3D Taylor-Green vortex. The results are compared with classical time discretization strategies. Timings obtained in three different hardware configurations show that the new TSRK methods of order four are 25% faster than LSRK schemes of the same order. Fifth and sixth order TSRK methods are tested with the same 3D test case and the results are compared to LSRK algorithms. Results show TSRK schemes of fifth and sixth order are competitive compared to LSRK methods of the same orders, as LSRK methods are of second order for non linear differential systems.

Original languageEnglish (US)
Pages (from-to)1-20
Number of pages20
JournalApplied Numerical Mathematics
Volume159
DOIs
StatePublished - Jan 2021

Keywords

  • Computational fluid dynamics solvers
  • Large-eddy simulations
  • Stability analysis
  • Stage order and order conditions
  • Two-step Runge-Kutta methods

ASJC Scopus subject areas

  • Numerical Analysis
  • Computational Mathematics
  • Applied Mathematics

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