Coherent eddies induced by breakers on a sloping bed

Nobuhiro Matsunaga, Kosei Takehara, Yoichi Awaya

    研究成果: Chapter in Book/Report/Conference proceedingConference contribution

    6 被引用数 (Scopus)


    The separation of boundary layer occurs periodically near a breaking point when incident waves climbing up a sloping bed are about to break. Not the breaker but the separation forms an unsteady coherent eddy, which suspends a large amount of bed material. A row of steady vortices has been found along the water surface of an offshore zone. Its formation is due to the shear instability between shoreward steady flow induced near the bed and offshore steady flow near the water surface. Moving in the offshore direction, the steady vortices repeat amalgamation each other and increase their intervals at the order of mean water depth. They decay after reaching to the region where the shear rate is not enough between the two steady flows. This shear instability may be excited by the periodic separation of boundary layer.

    ホスト出版物のタイトルTwenty First Coastal Eng Conf
    出版社Publ by ASCE
    出版ステータス出版済み - 12 1 1988
    イベントTwenty-First Coastal Engineering Conference - Costa del Sol, Malaga, Spain
    継続期間: 6 20 19886 25 1988


    名前Twenty First Coastal Eng Conf


    その他Twenty-First Coastal Engineering Conference
    CityCosta del Sol, Malaga, Spain

    All Science Journal Classification (ASJC) codes

    • 工学(全般)


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