Visualization of flow and vortex structure around a swimming loach by dynamic stereoscopic PIV |
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| Authors: | Katsuya Nagayama Toshimasa Tanaka Kazuhiro Tanaka Hiroshi Hayami Shinichiro Aramaki |
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| Institution: | (1) Kyushu Institute of Technology, Iizuka 820-8502, Japan;(2) Kyushu University, Kasuga 816-8580, Japan |
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| Abstract: | Loach has a unique swimming style of bending the whole body and staying at the bottom of water. We studied the three-dimensional
flow field around and behind the loach using stereoscopic-PIV. We captured flow fields in horizontal and vertical plane, and
it seems loach leaves vortex tube arches. From the analysis of body motion and flow field, we propose flow structure with
vortex tube arches connected along the loach body. After being released, they are separated and flow away and dissipate.
This research article was submitted for the special issue on Animal locomotion: The hydrodynamics of swimming (Vol. 43, No.
5). |
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