The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Wake topology and hydrodynamic performance of low-aspect-ratio flapping foils
Abstract
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 detailed analysis of the vortex topology shows that the wake of low-aspect-ratio flapping foils is dominated by two sets of interconnected vortex loops that evolve into distinct vortex rings as they convect downstream. The flow downstream of these flapping foils is characterized by two oblique jets and the implications of this characteristic on the hydrodynamic performance are examined. Simulations are also used to examine the thrust and propulsive efficiency of these foils over a range of Strouhal and Reynolds numbers as well as pitch-bias angles.
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Cites
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Self-citationOscillating foils of high propulsive efficiency
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Flying and swimming animals cruise at a Strouhal number tuned for high power efficiency
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Optimal Thrust Development in Oscillating Foils with Application to Fish Propulsion
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The control of flight force by a flapping wing: lift and drag production
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The aerodynamics of hovering insect flight. II. Morphological parameters
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Vortical patterns in the wake of an oscillating airfoil
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A Computational Fluid Dynamic Study of Hawkmoth Hovering
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Review of Experimental Work in Biomimetic Foils
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Metadata
- Authors
- DONG, H., MITTAL, R., & NAJJAR, F. M.
- Venue
- Journal of Fluid Mechanics
- Publisher
- Cambridge University Press (CUP)
- Published
- 2006-10-05
- Volume
- 566
- Pages
- 309-343
- ISSN
- 0022-1120 (ISSN-L)
- 1469-7645
- OpenAlex
- W2163383364
- Cited by
- 429
- References
- 24
- FWCI
- 33.81
- Type
- journal article
- Language
- en
- Open access
- closed
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