Journal of Hydrodynamics

, Volume 18, Issue 1, pp 428–432 | Cite as

Hydrodynamics in a diamond-shaped fish school

  • Jian Deng
  • Xue-ming Shao
Session A7


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.

Key words

fish-like swimming propulsion fish school 


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Copyright information

© China Ship Scientific Research Center 2006

Authors and Affiliations

  1. 1.Department of MechanicsZhejiang UniversityHangzhouChina
  2. 2.Department of Mechanics, State Key Laboratory of Fluid Power Transmission and ControlZhejiang UniversityHangzhouChina

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