The offshore vortex train

Nobuhiro Matsunaga, K. Takehara, Y. Awaya

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    A row of two-dimensional vortices forms in an offshore zone when regular surface waves run up a sloping flat bed. This vortex row is called the offshore vortex train. The vortices begin to appear near the breaking point. Moving in the offshore direction, they develop and increase their horizontal lengthscale through vortex merging. After reaching a particular offshore location, however, they decay rapidly. The formation region of the vortex train has been investigated on the basis of visual experiments for three bed slopes. Its formation does not depend on the type of wave breaking but is observed when the steepness of deep-water waves is smaller than 4.2 × 10−2. The horizontal lengthscale of the vortices and the velocities of the vortex movement have also been evaluated empirically.

    Original languageEnglish
    Pages (from-to)113-124
    Number of pages12
    JournalJournal of Fluid Mechanics
    Volume276
    Issue number5
    DOIs
    Publication statusPublished - Oct 10 1994

    Fingerprint

    Vortex flow
    vortices
    beds
    slopes
    water waves
    deep water
    Water waves
    Merging
    Surface waves
    surface waves
    decay
    Experiments

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Matsunaga, N., Takehara, K., & Awaya, Y. (1994). The offshore vortex train. Journal of Fluid Mechanics, 276(5), 113-124. https://doi.org/10.1017/S002211209400248X

    The offshore vortex train. / Matsunaga, Nobuhiro; Takehara, K.; Awaya, Y.

    In: Journal of Fluid Mechanics, Vol. 276, No. 5, 10.10.1994, p. 113-124.

    Research output: Contribution to journalArticle

    Matsunaga, N, Takehara, K & Awaya, Y 1994, 'The offshore vortex train', Journal of Fluid Mechanics, vol. 276, no. 5, pp. 113-124. https://doi.org/10.1017/S002211209400248X
    Matsunaga N, Takehara K, Awaya Y. The offshore vortex train. Journal of Fluid Mechanics. 1994 Oct 10;276(5):113-124. https://doi.org/10.1017/S002211209400248X
    Matsunaga, Nobuhiro ; Takehara, K. ; Awaya, Y. / The offshore vortex train. In: Journal of Fluid Mechanics. 1994 ; Vol. 276, No. 5. pp. 113-124.
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