Wake structure and hydrodynamic performance of flapping foils mimicking fish fin kinematics
نویسندگان
چکیده
منابع مشابه
Hydrodynamic Performance of Deformable Fish Fins and Flapping Foils
A computational study of fish fin hydrodynamics is being conducted concurrently with experimental analysis. The presence of a complex shaped moving boundary makes this a difficult proposition for computational fluid dynamics and here we use a Cartesian grid based immersed boundary solver designed to handle such flows in all their complexity. High resolution, high speed video of fish fin movemen...
متن کاملWake Structure and Performance of Finite Aspect-Ratio Flapping Foils
Most wings and fins found in nature tend to be of low or moderate aspect-ratio. However, most experimental and numerical studies in this area of bio-hydrodynamics have focused on examining large or infinite aspect-ratio flapping foils. In the current study, an efficient, finite-difference based immersed boundary solver for computing flows with moving immersed boundaries has been developed to ex...
متن کاملWake topology and hydrodynamic performance of low-aspect-ratio flapping foils
Numerical simulations are used to investigate the effect of aspect ratio on the wake topology and hydrodynamic performance of thin ellipsoidal flapping foils. The study is motivated by the quest to understand the hydrodynamics of fish pectoral fins. The simulations employ an immersed boundary method that allows us to simulate flows with complex moving boundaries on fixed Cartesian grids. A deta...
متن کاملComputational Analysis of 3d Fin-fin Interaction in Fish’s Steady Swimming
Three-dimensional numerical simulations are used to investigate the hydrodynamic performance and the wake patterns of a sunfish in steady swimming. Immersed boundary method for deformable attaching bodies (IBM-DAB) are used to handle complex moving boundaries of one solid body (fish body) attached with several membranes (fins). The effects of the vortices shed from both the dorsal and anal fins...
متن کاملMyliobatoid-inspired Flapping Fin: Qualitative Flow Structure
Myliobatidae is a family of large pelagic rays including cownose, eagle and manta rays. They are extremely efficient swimmers, can cruise at high speeds and can perform turn-on-a-dime maneuvering, making these fishes excellent inspiration for an autonomous underwater vehicle. Myliobatoids have been studied extensively from a biological perspective; however the fluid mechanisms that produce thru...
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ژورنال
عنوان ژورنال: Saudi Journal of Biological Sciences
سال: 2017
ISSN: 1319-562X
DOI: 10.1016/j.sjbs.2016.09.015