Numerical and experimental analysis for influence of the caudal fin shape on the propulsion performance

2010 ◽  
Author(s):  
Yumin Su ◽  
Xi Zhang
Keyword(s):  
Experimental Analysis ◽  
Caudal Fin ◽  
Propulsion Performance ◽  
Caudal Fin Shape ◽  
Fin Shape

Grammatonotus bianchi, a new species of splendid perch (Percoidei: Callanthiidae) from Myanmar, northeastern Indian Ocean

Zootaxa ◽  
2021 ◽  
Vol 4996 (3) ◽  
pp. 513-524
Author(s):  
MARK W. LISHER ◽  
HTUN THEIN ◽  
PETER N. PSOMADAKIS
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Andaman Sea ◽  
Caudal Fin ◽  
Large Head ◽  
Caudal Fin Shape ◽  
A New Species ◽  
Fin Shape

A new splendid perch, Grammatonotus bianchi sp. nov. is described on the basis of two specimens (45.9–68.7 mm SL) collected at 184 m depth in the Andaman Sea off the coast of Myanmar during bottom surveys conducted by the R/V Dr Fridtjof Nansen in 2018. The new species can be distinguished from all congeners by its large head (37.7–38.6% SL), large orbit (14.4–15.3% SL), caudal-fin shape, and fresh coloration. A key to Indian Ocean species of Grammatonotus is provided.  

Ontogeny of head and caudal fin shape of an apex marine predator: The tiger shark (Galeocerdo cuvier)

2016 ◽  
Vol 277 (5) ◽  
pp. 556-564 ◽  
Author(s):  
Amy L. Fu ◽  
Neil Hammerschlag ◽  
George V. Lauder ◽  
Cheryl D. Wilga ◽  
Chi-Yun Kuo ◽  
...  
Keyword(s):  
Tiger Shark ◽  
Caudal Fin ◽  
Marine Predator ◽  
Galeocerdo Cuvier ◽  
Caudal Fin Shape ◽  
Fin Shape

Impact of Caudal Fin Shape on Thrust Production of a Thunniform Swimmer

2020 ◽  
Vol 17 (2) ◽  
pp. 254-269
Author(s):  
Alexander Matta ◽  
Hodjat Pendar ◽  
Francine Battaglia ◽  
Javid Bayandor
Keyword(s):  
Caudal Fin ◽  
Caudal Fin Shape ◽  
Thrust Production ◽  
Fin Shape

scholarly journals The Analysis of Biomimetic Caudal Fin Propulsion Mechanism with CFD

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Guijie Liu ◽  
Shuikuan Liu ◽  
Yingchun Xie ◽  
Dingxin Leng ◽  
Guanghao Li
Keyword(s):  
High Efficiency ◽  
High Mobility ◽  
Caudal Fin ◽  
Propulsion Performance ◽  
Propulsion Force ◽  
St Number ◽  
Underwater Movement ◽  
The Mathematical Model ◽  
Bionic Propulsion ◽  
Bionic Underwater Robot

In nature, fish not only have extraordinary ability of underwater movement but also have high mobility and flexibility. The low energy consumption and high efficiency of fish propulsive method provide a new idea for the research of bionic underwater robot and bionic propulsive technology. In this paper, the swordfish was taken as the research object, and the mechanism of the caudal fin propulsion was preliminarily explored by analyzing the flow field structure generated by the swing of caudal fin. Subsequently, the influence of the phase difference of the heaving and pitching movement, the swing amplitude of caudal fin, and Strouhal number (St number) on the propulsion performance of fish was discussed. The results demonstrated that the fish can obtain a greater propulsion force by optimizing the motion parameters of the caudal fin in a certain range. Lastly, through the mathematical model analysis of the tail of the swordfish, the producing propulsive force principle of the caudal fin and the caudal peduncle was obtained. Hence, the proposed method provided a theoretical basis for the design of a high-efficiency bionic propulsion system.

Mechanical Design of Biomimetic Fish Robot Using LIPCA as Artificial Muscle

2006 ◽  
Vol 326-328 ◽  
pp. 1443-1446 ◽  
Author(s):  
Tedy Wiguna ◽  
Seok Heo ◽  
Hoon Cheol Park ◽  
Nam Seo Goo
Keyword(s):  
Swimming Speed ◽  
Mechanical Design ◽  
Beat Frequency ◽  
Artificial Muscle ◽  
Linkage Mechanism ◽  
Fish Robot ◽  
Caudal Fin ◽  
Caudal Fin Shape ◽  
Swimming Test ◽  
Four Bar Linkage

This paper presents a mechanical design of biomimetic fish robot using the Lightweight Piezo-Composite Actuator (LIPCA). We have designed a mechanism for converting actuation of the LIPCA into caudal fin movement. The linkage mechanism consists of rack-pinion and four-bar linkage systems. Two kinds of caudal fins are fabricated such that the shapes resemble subcarangiform and ostraciiform caudal fin shape, respectively, and then attached to the linkage system. The swimming test using 300 Vpp input with 1 Hz to 3 Hz frequency was conducted to investigate the effect of tail beat frequency and shape of caudal fin on the swimming speed. The maximum swimming speed was reached when the device was operated at its natural swimming frequency. At the natural swimming frequency of 1.016 Hz, maximum swimming speeds were 1.267 cm/s and 1.041 cm/s for ostraciiform and subcarangiform caudal fin, respectively. The Strouhal numbers, which are a measure of thrust efficiency, were also calculated in order to examine thrust performance of the present biomimetic fish robot.

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