An elastic rod model for anguilliform swimming.

An elastic rod model for anguilliform swimming. Research Abstract Details 

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An elastic rod model for anguilliform swimming. Abstract Text:

T McMillen,P Holmes,

We develop a model for anguilliform (eel-like) swimming as an elastic rod actuated via time-dependent intrinsic curvature and subject to hydrodynamic drag forces, the latter as proposed by Taylor (in Proc Roy Proc Lond A 214:158-183, 1952). We employ a eometrically exact theory and discretize the resulting nonlinear partial differential evolution both to perform numerical simulations, and to compare with previous models consisting of chains of rigid links or masses connected by springs, dampers, and prescribed force generators representing muscles. We show that muscle activations driven by motoneuronal spike trains via calcium dynamics produce intrinsic curvatures corresponding to near-sinusoidal body shapes in longitudinally-uniform rods, but that passive elasticity causes Taylor's assumption of prescribed shape to fail, leading to time-periodic motions and lower speeds than those predicted Taylor (in Proc Roy Proc Lond A 214:158-183, 1952). We investigate the effects of bending stiffness, body geometry, and activation patterns on swimming speed, turning behavior, and acceleration to steady swimming. We show that laterally-uniform activation yields stable straight swimming and laterally differential activation levels lead to stable turns, and we argue that tapered bodies with reduced caudal (tail-end) activation (to produce uniform intrinsic curvature) swim faster than ones with uniform activation.

An elastic rod model for anguilliform swimming. Publishing Authors By Initials

T McMillen,P Holmes,

For similar musculoskeletal, neural, and ocular physiology: musculoskeletal physiology: musculoskeletal physiologic processes: movement: locomotion: swimming research abstracts see: musculoskeletal, neural, and ocular physiology: musculoskeletal physiology: musculoskeletal physiologic processes: movement: locomotion: swimming research

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An elastic rod model for anguilliform swimming. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of mathematical biology

VOLUME: 53

Page Numbers: 843-86

Journal Abbreviation:

ISSN: 0303-6812

DAY: 14

MONTH: 09

YEAR: 2006

An elastic rod model for anguilliform swimming. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7502105

An elastic rod model for anguilliform swimming. Keywords Mesh Terms:

KEYWORDS: Swimming

MESH TERMS: physiology

Chemical & Substance for Abstract: An elastic rod model for anguilliform swimming. Information

Substance Name: Calcium

Registry Number: 7440-70-2

Grant and Affiliation Information for An elastic rod model for anguilliform swimming.

AFFILIATION: Program in Applied and Computational Mathematics, Princeton University, Princeton, NJ 08544, USA. mcmillen@princeton.edu

Country: Germany

AGENCY: United States NINDS

GRANT: NS054271

ACRONYM: NS

MEDLINETA: J Math Biol

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