Wake structure and hydrodynamic performance of flapping foils mimicking fish fin kinematics
Joint Authors
Liu, Weixing
Li, Ningyu
Zhao, Jinxin
Su, Yumin
Source
Saudi Journal of Biological Sciences
Issue
Vol. 24, Issue 6 (30 Sep. 2017), pp.1344-1354, 11 p.
Publisher
Publication Date
2017-09-30
Country of Publication
Saudi Arabia
No. of Pages
11
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Abstract EN
Numerical simulations are used to investigate the wake structure and hydrodynamic performance of bionic flapping foils.
The study is motivated by the quest to understand the fluid dynamics of fish fins and use it in the underwater propulsion.
The simulations employ an immersed boundary method that makes it possible to simulate flows with complex moving boundaries on fixed Cartesian grids.
A detailed analysis of the vortex topology shows that the wake of flapping foils is dominated by two sets of complex shaped vortex rings that convect at oblique angles to the wake centerline.
The wake of these flapping foils is characterized by two oblique jets.
Simulations are also used to examine the wake vortex and hydrodynamic performance over a range of Strouhal numbers and maximum pitch angles and the connection between the foil kinematics, vortex dynamics and force production is discussed.
The results show that the variety law of the hydrodynamic performance with kinematic parameters strongly depends on the flow dynamics underlying the force production, including the orientation, interconnection and dissipation rate of the vortex rings.
American Psychological Association (APA)
Liu, Weixing& Li, Ningyu& Zhao, Jinxin& Su, Yumin. 2017. Wake structure and hydrodynamic performance of flapping foils mimicking fish fin kinematics. Saudi Journal of Biological Sciences،Vol. 24, no. 6, pp.1344-1354.
https://search.emarefa.net/detail/BIM-776504
Modern Language Association (MLA)
Liu, Weixing…[et al.]. Wake structure and hydrodynamic performance of flapping foils mimicking fish fin kinematics. Saudi Journal of Biological Sciences Vol. 24, no. 6 (Sep. 2017), pp.1344-1354.
https://search.emarefa.net/detail/BIM-776504
American Medical Association (AMA)
Liu, Weixing& Li, Ningyu& Zhao, Jinxin& Su, Yumin. Wake structure and hydrodynamic performance of flapping foils mimicking fish fin kinematics. Saudi Journal of Biological Sciences. 2017. Vol. 24, no. 6, pp.1344-1354.
https://search.emarefa.net/detail/BIM-776504
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 1353-1354
Record ID
BIM-776504