抄録
Behavior of vortices near the wind wave surface is measured by using three high-speed video cameras and the Moving Least Square (MLS) method for vorticity estimations. The high-speed video cameras can increase the sampling rate andthe MLS method can estimate accurate vorticity profile from randomly distributed velocity profiles. The Particle Tracking Velocimetry, PTV, is applied to measure two dimensional flow fields close to the interface in detail. The vorticesare generated at the surfaces by the interaction between the wind shear and wind waves. The generated vorticesseparate from the surface and fall down to the bulk water. The generated vortex increases their spatial scale by unitingthe other vortex.
