2407 クロール泳者の手の動作分析とPIV計測法による流れ場の可視化(S43-2 スポーツ流体工学(2),S43 スポーツ流体工学)  [in Japanese] 2407 Motion Analysis of Front Crawl Swimmer's Hand and the Visualization of Flow Fields Using PIN  [in Japanese]

Flow fields around a swimmer are extremely unsteady. Top swimmers are expected to swim using effectively unsteady flow force. A motion analysis can evaluate the unsteady motion of swimmer quantitatively. In addition, PIV (Particle Image Velocimetry) can visualize the unsteady flow field. With this method, the vortex motion around a hand can be evaluated quantitatively. Our study is to clarify the relationship between the vortex behavior and the motion of a hand in crawl swimming by using the motion analysis combined with PIV. The analysis is made for two subjects ; one is a male with no competitive career and the other a female Olympic swimmer. It was found that the hand motion in swimming was closely related to the vortex generation.