Journal
COMMUNICATIONS IN COMPUTATIONAL PHYSICS
Volume 11, Issue 4, Pages 1323-1333Publisher
GLOBAL SCIENCE PRESS
DOI: 10.4208/cicp.090510.150511s
Keywords
Finlets; fish swimming; Immersed Boundary method; wake structure
Categories
Funding
- Chinese Academy of Sciences [KJCX-SW-L08]
- Mathematical modeling of complex system [KJCX3-SYW-S01]
- National Basic Research Program of China (973 Program) [2007CB814800]
- National Natural Science Foundation of China [10702074, 10872201]
- Supercomputing Center of Chinese Academy of Sciences
- Shanghai Supercomputer Center
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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].
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