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Effects of stiffness distribution and spanwise deformation on the dynamics of a ray-supported caudal fin.
- Source :
-
Bioinspiration & biomimetics [Bioinspir Biomim] 2017 Mar 07; Vol. 12 (2), pp. 026011. Date of Electronic Publication: 2017 Mar 07. - Publication Year :
- 2017
-
Abstract
- Using a fluid-structure interaction model, we study the effect of ray stiffness distribution on the deformation and performance of a caudal fin. By prescribing a simple swaying motion, our results show that through passive structural deformation alone it is possible to reproduce some complicated fin movements (e.g. the cup and 'W'-shape deformations) observed in real fish. Moreover, it has been numerically shown that, compared with a fin with uniform ray stiffness, at the same (average) ray stiffness fins with nonuniform stiffness distribution may achieve further performance enhancement, e.g. increase in propulsion efficiency and decrease in lateral force generation. This is attributed to spanwise deformations caused by phase differences between different rays.
Details
- Language :
- English
- ISSN :
- 1748-3190
- Volume :
- 12
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Bioinspiration & biomimetics
- Publication Type :
- Academic Journal
- Accession number :
- 28140357
- Full Text :
- https://doi.org/10.1088/1748-3190/aa5d3f