A FLOW VISUALEATION OF UNDULATORY UNDERWATER SWIMMING -A PILOT STUDY OF THREE DEIMENTIONAL AMALYSIS

##article.authors##

  • Hirofumi Shimojo
  • Ryo Murakawa
  • Yasuo Sengoku
  • Jun Sakakibara
  • Shozo Tsubakimoto
  • Hideki Takagi

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PIV##common.commaListSeparator## vortex##common.commaListSeparator## dolphin kick##common.commaListSeparator## motion capture

##article.abstract##

The purpose of this study was to visualize the flow characteristic behind a swimmer during undulatory underwater swimming (UUS). A male college swimmer performed dolphin kicks in a water flume channel (flow velocity was set at 0.8 m+sl). By using the stereo PIV system, we captured the flow vector field in cross-sectional areas behind the swimmer and the swimmer's motions with a synchronized motion capture system. The vector fields were averaged for each kicking phase, and for spatial cross-sectional plane. This enabled visualization oft he three dimensional flow field in UUS. The results showed that the swimmer created a counter vortex pair around the feet before the downward kid, and this appeared to assist the generation of thrust during the down kick motion.

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##submissions.published##

2016-11-06

##issue.issue##

34 International Conference of Biomechanics in Sport (2016)

##section.section##

Coaching and Sports Activities

##submission.license##

Authors can retain copyright, while granting the International Society of Biomechanics in Sports (ISBS) the right of first publication.