Iosilevskii G, Weihs D
Faculty of Aerospace Engineering, Technion, Haifa 32000, Israel.
J R Soc Interface. 2009 Jul 6;6(36):613-26. doi: 10.1098/rsif.2008.0457. Epub 2008 Dec 15.
Physalia physalis, commonly known as the Portuguese man-of-war (PMW), is a peculiar looking colony of specialized polyps. The most conspicuous members of this colony are the gas-filled sail-like float and the long tentacles, budding asymmetrically beneath the float. This study addresses the sailing of the PMW, and, in particular, the hydrodynamics of its trailing tentacles, the interaction between the tentacles and the float and the actual sailing performance. This paper attempts to provide answers for two of the many open questions concerning P. physalis: why does it need a sail? and how does it harness the sail?
僧帽水母，通常被称为葡萄牙战舰水母（PMW），是一种外观奇特的由特化息肉组成的群体。这个群体中最显眼的成员是充满气体的帆状浮囊和长长的触手，触手在浮囊下方不对称地长出。本研究探讨了葡萄牙战舰水母的航行，特别是其拖曳触手的流体动力学、触手与浮囊之间的相互作用以及实际的航行性能。本文试图为众多关于僧帽水母的未解决问题中的两个提供答案：它为什么需要帆？以及它如何利用帆？
