| DYNAMICS OF FREE STRAIGHT SWIMMING OF ANGULLA ANGULLA INCLUDING FORWARD, BRAKING AND BACKWARD LOCOMOTION |
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| 作者姓名： | HU Wen-rong TONG Bing-gang LIU Hao |
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| 作者单位： | HU Wen-rong Department of Engineering Mechanics，Shanghai Jiaotong University，Shanghai 200240，China Laboratory for Biomechanics of Animal Locomotion，Graduate University of the Chinese Academy of Sciences，Beijing 100039，China TONG Bing-gang Laboratory for Biomechanics of Animal Locomotion，Graduate University of the Chinese Academy of Sciences，Beijing 100039，China LIU Hao Department of Electronics and Mechanical Engineering，Chiba University，Japan |
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| 基金项目： | 国家自然科学基金;中国科学院基金 |
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| 摘 要： | Eels can swim backward by reversing the direction of the traveling wave along the body. The propulsive mechanism of an eel, angulla angulla, during its self-propelled straight swimming, including forward swimming, braking and switching direction to backward swimming was numerically studied. The problem was reasonably simplified to a loose-coupling problem of fish swimming dynamics and hydrodynamics only in the swimming direction. The approach involved the simulation of the flow by solving the two-dimensional unsteady incompressible N-S equations and the fish motion dynamic problem with Newton’s second law. Visualizations of flow fields and vortex structures were performed. The propulsive mechanism and dynamics during each process were investigated and the effects of controllable factors on forward free swimming were discussed.
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| 关 键 词： | 推进机制 动力学 垂直移动 方程式 连接模式 |
| 收稿时间： | 17 May 2006 |
| 修稿时间： | 2006-05-17 |
DYNAMICS OF FREE STRAIGHT SWIMMING OF ANGULLA ANGULLA INCLUDING FORWARD, BRAKING AND BACKWARD LOCOMOTION |
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| HU Wen-rong TONG Bing-gang LIU Hao.DYNAMICS OF FREE STRAIGHT SWIMMING OF ANGULLA ANGULLA INCLUDING FORWARD, BRAKING AND BACKWARD LOCOMOTION[J].Journal of Hydrodynamics,2007,19(4):395-402. |
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| Authors: | HU Wen-rong TONG Bing-gang LIU Hao |
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| Affiliation: | 1. Dept. of Mechanical Engineering and Biomedical Engineering Research Centre, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Catalonia, Spain;2. Dept. of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain;3. Laboratory of Mechanical Engineering, Escuela Politecnica Superior, Universidad de La Coruña, Mendizábal s/n, 15403 Ferrol, Spain |
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| Abstract: | Eels can swim backward by reversing the direction of the traveling wave along the body. The propulsive mechanism of an eel, angulla angulla, during its self-propelled straight swimming, including forward swimming, braking and switching direction to backward swimming was numerically studied. The problem was reasonably simplified to a loose-coupling problem of fish swimming dynamics and hydrodynamics only in the swimming direction. The approach involved the simulation of the flow by solving the two-dimensional unsteady incompressible N-S equations and the fish motion dynamic problem with Newton's second law. Visualizations of flow fields and vortex structures were performed. The propulsive mechanism and dynamics during each process were investigated and the effects of controllable factors on forward free swimming were discussed. |
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| Keywords: | self-propelled propulsive mechanism Navier-Stokes equations coupling problem |
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