Treatment of unphysical numerical oscillations via local grid refinement

Haosen H.A. Xu, Xiang I.A. Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Unphysical numerical oscillations (UNOs) arise when a non-dissipative scheme is employed to discretize fluid equations on a coarse grid. Treating UNOs often relies on upwind schemes, digital filtration, artificial viscosity, or adaptive mesh refinement, which are either too dissipative or too costly. We propose an alternative solution by refining one grid in regions where the flow velocity changes drastically. The effectiveness of our single-point grid refinement strategy is tested in various two-dimensional and three-dimensional flows at both laminar and turbulent flow conditions, and the results are highly favorable.

Original languageEnglish (US)
Article number077104
JournalPhysics of Fluids
Volume33
Issue number7
DOIs
StatePublished - Jul 1 2021

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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