Volume 6, Issue 6
Topology Optimization of the Caudal Fin of the Three-Dimensional Self-Propelled Swimming Fish

Zhiqiang Xin and Chuijie Wu

10.4208/aamm.2013.m394

Adv. Appl. Math. Mech., 6 (2014), pp. 732-763.

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  • Abstract

Based on the boundary vorticity-flux theory,  topology optimization of the caudal fin of the three-dimensional self-propelled swimming fish is investigated by combining unsteady computational fluid dynamics with moving boundary and topology optimization algorithms in this study. The objective functional of topology optimization is the function of swimming efficiency, swimming speed and  motion direction control. The optimal caudal fin, whose topology is different from that of the natural fish caudal fin, make the 3D bionic fish achieve higher swimming efficiency, faster swimming speed and better maneuverability. The boundary vorticity-flux on the body surface of the 3D fish before and after optimization reveals the mechanism of high performance swimming of the topology optimization bionic fish. The comparative analysis between the swimming performance of the 3D topology optimization bionic fish and the 3D lunate tail bionic fish is also carried out, and the wake structures of two types of bionic fish show the physical nature that the swimming performance of the 3D topology optimization bionic fish is significantly better than the 3D lunate tail bionic fish.

  • History

Published online: 2014-06

  • AMS Subject Headings

76Z10, 74F10

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