Three-dimensional geometry of the narwhal (Monodon monoceros) flukes in relation to hydrodynamics

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TitleThree-dimensional geometry of the narwhal (Monodon monoceros) flukes in relation to hydrodynamics
Publication TypeJournal Article
Year of Publication2011
AuthorsFontella, J. E., F. E. Fish, N. Rybczynski, M. T. Nweeia, and D. R. Ketten
JournalMarine Mammal Science
Volume27
Start Page889
Issue4
Pagination889-898
Date Published10/2011
Type of ArticleScientific
Keywordscetacean fluke, ct, hydrodynamics, medical imaging, monodon monoceros, narwahl ct scan, narwhal catscan, narwhal fluke, three-dimensional geometry, underwater locomotion, underwtaer propulsion
Abstract

Cetaceans (whales, porpoises, and dolphins) use only their flukes for propulsion. Flukes are distally located extensions of the tail, and from a biomechanical standpoint, function as a pair of wings (Vogel 1994). Flukes function to produce thrust generated as an anteriorly directed lift force as flukes oscillate vertically (Fish 1998a, b). Their cross-sections resemble hydrofoils. For a hydrofoil to be effective, a large lift must be produced while drag is minimized; this, in turn, increases the thrust generated
(Weihs 1989, Vogel 1994).

DOI10.1111/j.1748-7692.2010.00439.x