Analysis of the flow field of the krill, Euphausia pacifica
Analysis of the flow field of the krill, Euphausia pacifica
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磷虾、磷虾流场分析
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
D. Webster
中科院分区：
文献类型：
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作者：
J. Yen;Jason B. Brown;D. Webster
对太平洋磷虾（Euphausiapacifica）系留流场进行了流速测量。采用粒子图像测速技术（PIV）测量了磷虾体轴垂直面内的速度场。磷虾在腹足后面和下面（大约在水平线以下25°）产生一个狭窄的喷射流。在腹足附近以大于最大速度10%的速度移动的流体体积大约是磷虾体积的18倍。因此，流体动力学扰动占据了比动物身体大得多的区域。其他磷虾，感应到水流的扰动，可能会利用邻居引起的水流来定位配偶或进行有效的推进。
Velocity measurements were performed for the flow field generated by tethered krill Euphausia pacifica. The particle image velocimetry (PIV) technique was used to measure the velocity field in vertical planes aligned with the krill body axis. The krill generates a narrow jet-like flow behind and below the pleopods (roughly 25° below horizontal). The volume of fluid moving at greater than 10% of the maximum velocity near the pleopods is roughly 18 times larger than the volume of the krill. Thus, the hydrodynamic disturbance occupies a significantly larger region than the animal body. Other krill, sensing the flow disturbance, may take advantage of the flow induced by a neighbor to locate a mate or to draft for efficient propulsion.