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Numerical Simulation of a Three-Dimensional Fish-like Body Swimming with Finlets

Published online by Cambridge University Press:  20 August 2015

Shizhao Wang,
Xing Zhang and
Guowei He
Shizhao Wang*
Affiliation:
LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
Xing Zhang*
Affiliation:
LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
Guowei He*
Affiliation:
LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
*
Corresponding author.Email:wangsz@lnm.imech.ac.cn
Email:zhangx@lnm.imech.ac.cn
Email:hgw@lnm.imech.ac.cn
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Abstract

The swimming of a 3D fish-like body with finlets is numerically investigated at Re = 1000 (the Reynolds number is based on the uniform upstream flow and the length of the fish-like body). The finlets are simply modeled as thin rigid rectangular plates that undulate with the body. The wake structures and the flow around the caudal peduncle are studied. The finlets redirect the local flow across the caudal peduncle but the vortical structures in the wake are almost not affected by the finlets. Improvement of hydrodynamic performance has not been found in the simulation based on this simple model. The present numerical result is in agreement with that of the work of Nauen and Lauder [J. Exp. Biol., 204 (2001), pp. 2251-2263] and partially supports the hypothesis of Webb [Bull. Fish. Res. Bd. Can., 190 (1975), pp. 1-159].

Keywords

76D0576Z1076D17Finletsfish swimmingImmersed Boundary methodwake structure

Information

Type
Research Article
Information
Communications in Computational Physics , Volume 11 , Issue 4 , April 2012, pp. 1323 - 1333
Copyright
Copyright © Global Science Press Limited 2012

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