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Journal of Hydrodynamics

, Volume 18, Issue 1, pp 285–288 | Cite as

Propulsive mechanism of forward and backward free swimming of angulla angulla

  • Wen-rong Hu
  • Bin-gang Tong
Session A5

Abstract

Eels can swim backward by reversing the direction of the traveling wave along the body. The propulsive mechanism of an eel, angulla angulla, during its free forward swimming and switching direction to backward swimming has been studied numerically. The problem is reasonably simplified to a loose-coupling problem of fish swimming dynamics and hydrodynamics only in the heading direction. The approach involves the simulation of the flow by solving the two-dimensional unsteady incompressible N-S equations and the solution of fish motion dynamics problem by the Newton’s Second Law. Visualizations of flow fields and vortex structures are presented. The results show that thrust is associated with vortex structures in the wake.

Key words

propulsive mechanism Navier-stokes equations coupling problem 

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Copyright information

© China Ship Scientific Research Center 2006

Authors and Affiliations

  1. 1.Department of Engineering MechanicsShanghai Jiaotong UniversityShanghaiChina
  2. 2.Department of PhysicsGraduate School of the Chinese Academy of SciencesBeijingChina

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