其他null检测 | 浮游海蝴蝶的水下飞行-北京欧兰科技发展有限公司

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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。

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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

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北京欧兰科技发展有限公司

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