The velocity field under breaking waves: coherent structures and turbulence

  title={The velocity field under breaking waves: coherent structures and turbulence},
  author={W. Kendall Melville and Fabrice Veron and Christopher J. White},
  journal={Journal of Fluid Mechanics},
  pages={203 - 233}
Digital particle image velocimetry (DPIV) measurements of the velocity field under breaking waves in the laboratory are presented. The region of turbulent fluid directly generated by breaking is too large to be imaged in one video frame and so an ensemble-averaged representation of the flow is built up from a mosaic of image frames. It is found that breaking generates at least one coherent vortex that slowly propagates downstream at a speed consistent with the velocity induced by its image in… 

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