蓝鳃太阳鱼背臀鳍功能：稳定游动过程中流向涡结构

2008/06/14   下载量： 179 次

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Fishes have an enormous diversity of body shapes and fin morphologies. From a hydrodynamic standpoint, the functional significance of this diversity is poorly understood, largely because the three-dimensional flow around swimming fish is almost completely unknown. Fully three-dimensional volumetric flow measurements are not currently feasible, but measurements in multiple transverse planes along the body can illuminate many of the important flow features. In this study, I analyze flow in the transverse plane at a range of positions around bluegill sunfish Lepomis macrochirus, from the trailing edges of the dorsal and anal fins to the near wake. Simultaneous particle image velocimetry (PIV) and kinematic measurements were performed during swimming at 1.2·body·lengths·s–1 to describe the streamwise vortex structure, to quantify the contributions of each fin to the vortex wake, and to assess the importance of three-dimensional flow effects in swimming.

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上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 漩涡发生器，喷射频率，占空比，以及相位等对气泡分离动力学的作用和影响研究

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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