HYDRODYNAMICS IN A DIAMOND-SHAPED FISH SCHOOL
HYDRODYNAMICS IN A DIAMOND-SHAPED FISH SCHOOL
复制标题
DOI：
10.1016/s1001-6058(06)60090-5
复制
发表时间：
2006-07-01
影响因子：
2.5
通讯作者：
Shao Xue-ming
中科院分区：
文献类型：
--
作者：
Deng Jian;Shao Xue-ming
本文将计算流体力学应用于仿鱼游动，重点研究了仿鱼游动的推进机理。虽然以前的研究表明，菱形的鱼群是有益的减阻和效率的提高，个人可以受益于这样的学校，实验数据或数值研究的鱼群成员之间的相互作用的流体动力学是缺乏的。采用改进的浸入边界法进行数值模拟，并从菱形鱼群中选取三条鱼作为基本单元。结果表明，位于前列两条鱼之间的横向中间位置的鱼可以从上游鱼的反向卡门涡街脱落中受益，从而提高了推进效率，降低了功耗。这样的结果与前面的假设是一致的。
In this paper, the computational fluid dynamics was applied to fish-like swimming, and the propulsion mechanism of this motion was focused. Although previous researchers have suggested that a diamond shape of fish school is helpful for drag reduction and efficiency enhancement, and individuals can benefit from such a school, experimental data or numerical studies on the hydrodynamics of interactions among members in the fish school are lacking. An improved immersed boundary method was employed for the simulations, and a basic element of three fishes was picked out from the diamond-shaped fish school. The conclusion is drawn that a fish situated laterally midway between two fish of the preceding column can benefit from the reversed Karman vortex street shedding from the upstream fish; and therefore the propulsion efficiency is increased, and the power consumed is reduced. Such a result accords well with the previous hypothesis.