undulatory swimming

Undulatory swimming in viscoelastic fluids Phys. Rev. Lett

Undulatory swimming in viscoelastic fluids Phys. Rev. Lett. 106 (2011) 208101 Xiaoning Shen and P. E. Arratia Recommended with a commentary by Thomas R. Powers, Brown University It is a common observation that many microorganisms swim in water. At micron scales, water is very viscous, inertia is unimportant, and the fluid mechanics is described

UNDERWATER UNDULATORY SWIMMING: KINEMATIC CHARACTERISTICS

When a fish performs undulatory swimming the wake generated is very specific in the form of a sequence of vortices that alternate the direction of the rotation. While the tail swings to one side, creating a clockwise vortex, and then to the other, causing a counter-clockwise one (Triantafyllou & Triantafyllou, 1995), see figure 2.

The undulatory swimming gait of elongated swimmers

An undulatory swimming gait is characterized by short lateral displacement waves that propagate backwards along the body of the swimmer faster than it swims. Hydrodynamic theory of elongated bodies predicts that if the amplitude of the displacement waves does not increase toward the caudal end, the …

UNDULATORY SWIMMING: HOW TRAVELING WAVES ARE …

undulatory swimming: how traveling waves are produced and modulated in sunfish (lepomis gibbosus) Long J, Mchenry M, Boetticher N. We have developed an experimental procedure in which the in situ locomotor muscles of dead fishes can be electrically stimulated to generate swimming motions.

The boundary layer of swimming fish

the hydrodynamics of undulatory swimming remains elusive. Drag, thrust and power in undulatory swimming have not been definitively determined. This is, in part, because no definitive measurements of boundary layer flow over a swimming fish or cetacean have been performed. Few attempts have been made to characterize the boundary

Undulatory Swimming Performance and Body Stiffness

Undulatory motion of the body is the dominant mode of locomotion in fishes, and numerous studies of body kinematics and muscle activity patterns have provided insights into the mechanics of swimming.

Large-amplitude undulatory fish swimming

state swimming, so the assumption of constant U0 is a good approximation (Videler and Hess, 1984; Hill, 1998). The classical theory for undulatory fish swimming is Lighthill’s elongated-body theory, first proposed in a remarkably concise but complete paper in 1960 (Lighthill, 1960), in which small-amplitude undulations were assumed,

Undulatory Swimming - SMU

At the other end of the spectrum, undulatory swimming may involve noticeable undulation of most of the animal body, not just the tail. This is typical of eel swimming (genus Anguilla), giving it the name anguilliform swimming (swimming "like an eel"). Anguilliform swimmers often do not have a caudal fin distinct from the rest of their body (see the side view of an eel below).

The undulatory swimming gait of elongated swimmers

An undulatory swimming gait is characterized by short lateral displacement waves that propagate backwards along the body of the swimmer faster than it swims. Hydrodynamic theory of elongated bodies predicts that if the amplitude of the displacement waves does not increase toward the caudal end, the …

Undulation vs. Oscillation -

10/03/2010· Batoid fishes (sawfishes, skates, stingrays) are morphologically analogous having dorsoventrally flattened bodies and greatly expanded pectoral fins. Batoids

Phys. Rev. Fluids 6, 033101 (2021) - Unsteady propulsion

19/03/2021· Propulsive performance and acoustic emission of undulatory swimmers are investigated using an integrated unsteady potential flow and acoustic boundary element solver. Anguilliform and carangiform swimming gaits are modeled by a deforming NACA 0012 airfoil section. The effect of a ground plane on undulatory swimming and associated noise generation is examined as a function of …

Undulatory Swimming in Sand: Subsurface Locomotion of the

17/07/2009· Fig. 1. Burial and undulatory subsurface swimming of the (A) sandfish lizard.(B) The burying sandfish with opaque makers bonded to its fore (cyan) and hind (purple) lis and midline, just before it dives into the media.(C) Representative x-ray images of the sandfish as it moves with a diagonal gait on the surface, (D) as it buries into the media with high-amplitude oscillations and use of

Undulatory Swimming in Sand: Subsurface Locomotion of the

17/07/2009· Fig. 1. Burial and undulatory subsurface swimming of the (A) sandfish lizard.(B) The burying sandfish with opaque makers bonded to its fore (cyan) and hind (purple) lis and midline, just before it dives into the media.(C) Representative x-ray images of the sandfish as it moves with a diagonal gait on the surface, (D) as it buries into the media with high-amplitude oscillations and use of

Undulatory Swimming in Viscoelastic Fluids

Undulatory Swimming in Viscoelastic Fluids Abstract The effects of fluid elasticity on the swimming behavior of the nematode Caenorhabditis elegans are experimentally investigated by tracking the nematode’s motion and measuring the corresponding velocity …

Undulatory swimming in viscoelastic fluids Phys. Rev. Lett

Undulatory swimming in viscoelastic fluids Phys. Rev. Lett. 106 (2011) 208101 Xiaoning Shen and P. E. Arratia Recommended with a commentary by Thomas R. Powers, Brown University It is a common observation that many microorganisms swim in water. At micron scales, water is very viscous, inertia is unimportant, and the fluid mechanics is described

The physics of undulatory human swimming

03/10/2019· Regardless of the type of swimming stroke used for the rest of the lap, these competitors have discovered that this undulatory motion is the best way to accelerate quickly.

UNDULATORY SWIMMING: HOW TRAVELING WAVES ARE …

undulatory swimming: how traveling waves are produced and modulated in sunfish (lepomis gibbosus) Long J, Mchenry M, Boetticher N. We have developed an experimental procedure in which the in situ locomotor muscles of dead fishes can be electrically stimulated to generate swimming motions.

Large-amplitude undulatory swimming near a wall - IOPscience

05/01/2015· The experimental data presented in this work shows that swimming with large-amplitude undulatory motions at a moderate distance to a wall can have clear advantages in terms of velocity and thrust production. Positive ground (or wall) effect has been observed for the system presented here,

Undulatory and oscillatory swimming | Journal of Fluid

04/07/2019· Undulatory and oscillatory swimming 1 Introduction. The fluid dynamics of underwater propulsion is an area of research that has stimulated vigorous 2 Undulatory swimming. The force on each element of the cylinder is assumed to be the same as that which would act on a 3 Oscillatory Swimming.

Undulatory Swimming in a Nematode - Iowa State University

Undulatory Swimming in a Nematode (Genus Turbatrix aceti; common name "vinegar eels" CONTROLLING THE ANIMATION: Wait for the animation to load completely and play through once. To stop the animation, click on the "pause" button. To see the frame that precedes the paused frame, press the "previous" button.

Undulatory Swimming in Viscoelastic Fluids

Undulatory Swimming in Viscoelastic Fluids Abstract The effects of fluid elasticity on the swimming behavior of the nematode Caenorhabditis elegans are experimentally investigated by tracking the nematode’s motion and measuring the corresponding velocity …

Optimal shape and motion of undulatory swimming organisms

Undulatory swimming animals exhibit diverse ranges of body shapes and motion patterns and are often considered as having superior locomotory performance. The extent to which morphological traits of swimming animals have evolved owing to primarily locomotion considerations is, however, not clear. To …

Undulatory fish swimming: from muscles to flow

Undulatory swimming is employed by many fish for routine swimming and extended sprints. In this biomechanical review, we address two questions: (i) how the fish’s axial muscles power swimming; and (ii) how the fish’s body and fins generate thrust.

A Numerical Study of Undulatory Swimming - ScienceDirect

01/11/1999· Unsteady hydrodynamics around an undulatory swimming body is solved using a time-accurate solution of the three-dimensional, incompressible, laminar Navier–Stokes equations. A realistic tadpole-shaped body is modeled, which “swims” by sending a …

Fish optimize sensing and respiration during undulatory

24/03/2016· (a) The phase difference between yaw and heave increases linearly as a function of swimming speed (y=8.7x+37.6, R 2 =0.63, P<0.01, n=8 fish). …

Energetics of optimal undulatory swimming organisms

21/05/2009· Model of an undulatory swimmer. We study sustained straight-line undulatory swimming, where an organism passes a muscle-produced wave of curvature down its body and propels itself using the hydrodynamic forces exerted on the body as a reaction to the undulatory motion.

Continuously distributed magnetization profile for

Continuously distributed magnetization profile for millimeter-scale elastomeric undulatory swimming Eric Diller,1,2,a) Jiang Zhuang,1,a) Guo Zhan Lum,1,3 Matthew R. Edwards,1 and Metin Sitti1,b) 1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA 2Department of Mechanical and Industrial Engineering, University of Toronto, Toronto M5S 3G8, …

Undulatory Swimming in a Nematode - Iowa State University

Undulatory Swimming in a Nematode (Genus Turbatrix aceti; common name "vinegar eels" CONTROLLING THE ANIMATION: Wait for the animation to load completely and play through once. To stop the animation, click on the "pause" button. To see the frame that precedes the paused frame, press the "previous" button.