Conservative high-order flux-reconstruction schemes on moving and deforming grids

Yoshiaki Abe, Takanori Haga, Taku Nonomura, Kozo Fujii

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

An appropriate procedure to construct symmetric conservative metrics is presented for the high-order conservative flux-reconstruction scheme on three-dimensionally moving and deforming grids. The present framework enables direct discretization of the strong conservation form of governing equations without any errors in the freestream preservation and global conservation properties. We demonstrate that a straightforward implementation of the symmetric conservative metrics often fails to construct metric polynomials having the same order as a solution polynomial, which severely degrades the numerical accuracy. On the other hand, the symmetric conservative metrics constructed using an appropriate procedure can preserve the freestream solution regardless of the order of shape functions. Moreover, a convecting vortex is more accurately computed on deforming grids. The global conservation property is also demonstrated numerically for the convecting vortex on deforming grids.

Original languageEnglish
Pages (from-to)2-16
Number of pages15
JournalComputers and Fluids
Volume139
DOIs
Publication statusPublished - 2016 Nov 5
Externally publishedYes

Keywords

  • Conservative metrics
  • Flux reconstruction
  • Freestream preservation
  • Geometric conservation law
  • High-order unstructured scheme
  • Moving grids

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

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