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Evolution of turbulence in an oscillatory flow in a smooth-walled channel: A viscous secondary instability mechanism

  • J Cosgrove
  • , J Buick
  • , S Tonge

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this paper, a comparison is made of the evolution of turbulence in oscillatory channel flows with a zero-mean velocity in two and three dimensions, using the numerical technique of the lattice Boltzmannmethod. The results confirm a primary two-dimensional instability. Evidence is shown of a secondary, viscous three-dimensional instability mechanism acting in the oscillatory boundary layer, which is consistent with experimental observations.
    Original languageEnglish
    Pages (from-to)026302-1-026302-5
    JournalPhysical Review E
    Volume68
    Issue number2
    DOIs
    Publication statusPublished - 2003

    Keywords

    • Fluid Physics

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