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Relationship between vortex ring in tail fin wake and propulsive force
http://hdl.handle.net/2241/00122364
http://hdl.handle.net/2241/001223645d547cae-00ca-49cc-aeae-177faec9d36c
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EF_54 (2.2 MB)
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Supplementary material 1 (24.6 MB)
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Supplementary material 2 (15.1 MB)
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Supplementary material 3 (30.2 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2014-10-31 | |||||
タイトル | ||||||
タイトル | Relationship between vortex ring in tail fin wake and propulsive force | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Imamura, Naoto
× Imamura, Naoto× Matsuuchi, Kazuo |
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著者別名 |
松内, 一雄
× 松内, 一雄 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Our aim was to investigate the three-dimensional (3D) vortex ring in the wake of a tail fin and to clarify the propulsion mechanism of dolphins and fish. In this study, we replaced a tail fin in pitching motion with an oscillating wing having a drive unit. The flow fields around the wing were measured by stereoscopic particle image velocimetry. To visualize the 3D structure of the vortex in the wake, we determined the flow fields in equally spaced cross-sectional planes. We reconstructed the 3D velocity fields from the velocity data with three components in two dimensions. We visualized the 3D vortex structure from these velocity data and plotted an iso-vorticity surface. As a result, we found that the vortex ring was generated by the kick-down and kick-up motions of the wing and that the wake structure was comparable with that obtained numerically. Moreover, we calculated the propulsive forces from the temporal variations in circulation and in the area surrounded by the vortex ring. | |||||
書誌情報 |
Experiments in fluids 巻 54, 号 10, p. 1605, 発行日 2013-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0723-4864 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10447762 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s00348-013-1605-4 | |||||
権利 | ||||||
権利情報 | ©Springer-Verlag Berlin Heidelberg 2013.The final publication is available at link.springer.com | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Springer Berlin Heidelberg |