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

J. A . Cosgrove, James Buick, S. J. Tonge

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    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 Boltzmann method. 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
    Article number026302
    Pages (from-to)026302
    JournalPhysical Review E
    Volume68
    Early online date5 Aug 2003
    DOIs
    Publication statusPublished - 2003

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