• a theory for the hydrodynamic origin of whale flukeprints

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 777
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     whale flukeprints are an often observed, but poorly understood, phenomenon. used by whale researchers to locate whales, flukeprints refer to a strikingly smooth oval-shaped water patch which forms behind a swimming or diving whale on the surface of the ocean and persists up to several minutes. in this paper we provide a description of hydrodynamic theory and related experiments explaining the creation and evolution of these “whale footprints.” the theory explains that the motion of the fluke provides a mechanism for shedding of vortex rings which subsequently creates a breakwater that damps the short wavelength capillary waves. the theory also suggests that the role of natural surfactants are of secondary importance in the early formation of these prints.

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