scispace - formally typeset
Search or ask a question
Topic

Aquatic locomotion

About: Aquatic locomotion is a research topic. Over the lifetime, 69 publications have been published within this topic receiving 3796 citations. The topic is also known as: swim & active swimming.


Papers
More filters
Journal ArticleDOI
01 Dec 2018-Zoology
TL;DR: This work quantified the terrestrial movements of O. maculosus and compared them to their aquatic locomotion, terrestrial locomotion of closely-related subtidal species (Leptocottus armatus and Icelinus borealis, and Clarias spp.), and proposed behavioral adaptations may evolutionarily predate morphological adaptations for terrestrial locomotions in vertebrates.

11 citations

Journal Article
TL;DR: In this article, a scaling relation that links swimming speed U to body kinematics (tail beat amplitude A and frequency ω) and fluid properties (kinematic viscosity ν) was derived.
Abstract: Nonlinear inertial flows usually influence the motion of swimming organisms, but most studies focus on the tractable case of swimmers too small to feel such effects. A mechanistic principle now unifies the varied dynamics of macroscopic swimmers. Inertial aquatic swimmers that use undulatory gaits range in length L from a few millimetres to 30 metres, across a wide array of biological taxa. Using elementary hydrodynamic arguments, we uncover a unifying mechanistic principle characterizing their locomotion by deriving a scaling relation that links swimming speed U to body kinematics (tail beat amplitude A and frequency ω) and fluid properties (kinematic viscosity ν). This principle can be simply couched as the power law Re ∼ Swα, where Re = UL/ν ≫ 1 and Sw = ω AL/ν, with α = 4/3 for laminar flows, and α = 1 for turbulent flows. Existing data from over 1,000 measurements on fish, amphibians, larvae, reptiles, mammals and birds, as well as direct numerical simulations are consistent with our scaling. We interpret our results as the consequence of the convergence of aquatic gaits to the performance limits imposed by hydrodynamics.

10 citations

Proceedings ArticleDOI
12 Dec 2005
TL;DR: In this paper, the authors present experimental data elucidating the effects of hydrodynamic coupling on the propulsive efficiency of an array of three oscillating hydrofoils and derive a mathematical model in the form of a nonlinear control system describing the interaction of a single deformable body with a single nearby vortex.
Abstract: We present experimental data elucidating the effects of hydrodynamic coupling on the propulsive efficiency of an array of three oscillating hydrofoils. We simulate this system using an inviscid flow model; this model duplicates certain key features of our experimental data but fails to consider the effects of wake vortex generation and interaction. We present a qualitative model for the role played by wake vortex dynamics in the cooperative locomotion of fish schools, and derive a mathematical model in the form of a nonlinear control system describing the interaction of a single deformable body with a single nearby vortex. We present simulations based on the latter to illustrate the capture of vortices shed from one fish in a school by a second, trailing fish; vortex capture in this sense is the control problem central to cooperative swimming.

9 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used a self-propelling robot to comparatively examine swimming performance and wake development of metachronal and synchronous paddling under varying appendage spacing, phase lag, and stroke amplitude.
Abstract: Numerous species of aquatic invertebrates, including crustaceans, swim by oscillating multiple closely spaced appendages. The coordinated, out-of-phase motion of these appendages, known as "metachronal paddling", has been well-established to improve swimming performance relative to synchronous paddling. Invertebrates employing this propulsion strategy cover a wide range of body sizes and shapes, but the ratio of appendage spacing (G) to the appendage length (L) has been reported to lie in a comparatively narrow range of 0.2 < G/L ≤ 0.65. The functional role of G/L on metachronal swimming performance is unknown. We hypothesized that for a given Reynolds number and stroke amplitude, hydrodynamic interactions promoted by metachronal stroke kinematics with small G/L can increase forward swimming speed. We used a dynamically scaled self-propelling robot to comparatively examine swimming performance and wake development of metachronal and synchronous paddling under varying G/L, phase lag, and stroke amplitude. G/L was varied from 0.4 to 1.5, with the expectation that when G/L is large, there should be no performance difference between metachronal and synchronous paddling due to a lack of interaction between vortices that form on the appendages. Metachronal stroking at non-zero phase lag with G/L in the biological range produced faster swimming speeds than synchronous stroking. As G/L increased and as stroke amplitude decreased, the influence of phase lag on the swimming speed of the robot was reduced. For smaller G/L, vortex interactions between adjacent appendages generated a horizontally-oriented wake and increased momentum fluxes relative to larger G/L, which contributed to increasing swimming speed. We find that while metachronal motion augments swimming performance for closely spaced appendages (G/L < 1), moderately spaced appendages (1.0 ≤ G/L ≤ 1.5) can benefit from metachronal motion only when the stroke amplitude is large.

9 citations

Proceedings ArticleDOI
18 Apr 2005
TL;DR: The simulation result to find the suitable fish swimming modes (especially BCF swimming) for fishlike underwater robot system and derives the dynamic equation for each system using Kane’s method and these results are compared by the result of DADS.
Abstract: In this paper, we show the simulation result to find the suitable fish swimming modes (especially BCF swimming) for fishlike underwater robot system. To find the suitable swimming modes, we assume that they have the same length, volume, and weight, but they have the different numbers of actuator (joint). And we use the minimum number of joint for each swimming mode. We derive the dynamic equation for each system using Kane’s method and these results are compared by the result of DADS. We present the optimal solution of swimming mode for some aquatic locomotion, especially faster (high propulsive efficiency) and more maneuverable (quick turning motion).

8 citations


Network Information
Related Topics (5)
Wing
12.5K papers, 168.6K citations
76% related
Adaptation
3.3K papers, 168.6K citations
71% related
Sexual selection
9.9K papers, 588.7K citations
69% related
Allometry
2.2K papers, 115.8K citations
68% related
Ground reaction force
4K papers, 105.7K citations
68% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20217
20201
20194
20183
20173
20166