方案摘要
方案下载应用领域 | 其他 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
采用LaVision公司独特的层析PIV流场测量系统。可以得到浮游海蝴蝶水下游动(飞行)的3D3C流场。特别强调DaVis层析PIV分析软件包的自标定功能是实现这种测量的关键。
In a remarkable example of convergent evolution, we show that the
zooplanktonic sea butterfly Limacina helicina ‘flies’ underwater in the
sameway that very small insects fly in the air. Both sea butterflies and
flying insects stroke their wings in a characteristic figure-of-eight
pattern to produce lift, and both generate extra lift by peeling their
wings apart at the beginning of the power stroke (the well-known
Weis-Fogh ‘clap-and-fling’ mechanism). It is highly surprising to find a
zooplankter ‘mimicking’ insect flight as almost all zooplankton swim in
this intermediate Reynolds number range (Re=10–100) by using their
appendages as paddles rather than wings. The sea butterfly is also
unique in that it accomplishes its insect-like figure-of-eight wing stroke
by extreme rotation of its body (what we call ‘hyper-pitching’), a
paradigm that has implications for micro aerial vehicle (MAV) design.
No other animal, to our knowledge, pitches to this extent under normal
locomotion.
KEY WORDS: Pteropods, Zooplankton, Swimming, Weis-Fogh
mechanism, Insect flight, Convergent evolution
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
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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