Hydrodynamic Characterization of the<i>Polyodon spathula</i>Rostrum Using CFD

Allen, Jeffrey; Riveros, Guillermo A.

doi:10.1155/2013/346173

Cited by 13 publications

(13 citation statements)

References 17 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6). Hydrodynamic analysis of the paddlefish rostrum showed that it also generates substantial lift (Allen and Riveros, 2013). The presence of this lift-generating canard may be related to pitching moments created by the heterocercal caudal fin or to the filter feeding strategy of paddlefish.…”

Section: Secondary Structures Canard Wings Foils and Rostramentioning

confidence: 95%

Control surfaces of aquatic vertebrates: active and passive design and function

Fish

Lauder

2017

Journal of Experimental Biology

View full text Add to dashboard Cite

Aquatic vertebrates display a variety of control surfaces that are used for propulsion, stabilization, trim and maneuvering. Control surfaces include paired and median fins in fishes, and flippers and flukes in secondarily aquatic tetrapods. These structures initially evolved from embryonic fin folds in fishes and have been modified into complex control surfaces in derived aquatic tetrapods. Control surfaces function both actively and passively to produce torque about the center of mass by the generation of either lift or drag, or both, and thus produce vector forces to effect rectilinear locomotion, trim control and maneuvers. In addition to fins and flippers, there are other structures that act as control surfaces and enhance functionality. The entire body can act as a control surface and generate lift for stability in destabilizing flow regimes. Furthermore, control surfaces can undergo active shape change to enhance their performance, and a number of features act as secondary control structures: leading edge tubercles, wing-like canards, multiple fins in series, finlets, keels and trailing edge structures. These modifications to control surface design can alter flow to increase lift, reduce drag and enhance thrust in the case of propulsive fin-based systems in fishes and marine mammals, and are particularly interesting subjects for future research and application to engineered systems. Here, we review how modifications to control surfaces can alter flow and increase hydrodynamic performance.

show abstract

Section: Secondary Structures Canard Wings Foils and Rostramentioning

confidence: 95%

Control surfaces of aquatic vertebrates: active and passive design and function

Fish

Lauder

2017

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…It is long, broad, and flat, rounded at the tip, and rhomboidal in cross-section. The cartilage endoskeleton consists of a central gelatinous filled tube, flanked by two buttresses and supports a lattice-like network of small inter-connecting stellate bones (Allen and Riveros 2013;Allison et al 2013;Allis 1903;Davis 1959). The lattice and bone diameters are larger near the center of the rostrum and smaller near the edge; however, the pattern is not obvious.…”

Section: Previous Research On Rostrummentioning

confidence: 99%

Early detection of failure mechanisms in resilient biostructures : a network flow study

Patel¹,

Guillermo²,

Acosta³

et al. 2017

Self Cite

View full text Add to dashboard Cite

The area of bioinspired material design is fairly young and mainly unexploited. This research aims to gain fundamental understanding of the hierarchical lattice architecture in the paddlefish rostrum and use this knowledge to obtain new insights for a wide range of applications. This work presents an integrated, interdisciplinary approach that employs computational mechanics and the theory of network statistics to gain fundamental insights into the failure mechanisms of high performance, lightweight, structured composites by examining the geometry and material properties of the rostrum. Results from computational mechanics simulations and network flow analysis are presented with emphasis on the load transfer mechanism in the Bio-Structure. The structure is formed from a network of structural elements that carries forces through combinations, or chains, of structural members called force chains in reference to similar structures generally observed in granular media. These force chains are often aligned in the principal direction of the external stress to which the system is subjected. The current research presents a flow network analysis of the rostrum with and without the presence of the lattice architecture. Highly localized force chains were formed in the rostrum with similar loading conditions in absence of the lattice architecture. The flow network was also able to capture the stain localization in the tensile region of the rostrum and the asymmetrical response of the rostrum to uniform loading. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

show abstract

“…The rostrum is unusually large and variable in shape [3,4]. It has multiple vital functions, as a sensory antennae detecting vibratory and electrical signals [5][6][7] and as a locomotor structure providing lift and enhanceed swim speed [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Paddlefish swim at high speeds for extensive distances [8,11,14]. Allen and Riveros [9] demonstrated that lift generated by the rostrum was comparable to or exceeded that for man-made hydrofoils. Patel and Riveros [23] conducted fluid-structure interaction analysis on the rostrum.…”

Section: Introductionmentioning

confidence: 99%

Instrumenting Polyodon spathula (Paddlefish) Rostra in Flowing Water with Strain Gages and Accelerometers

et al. 2020

View full text Add to dashboard Cite

The prominent rostrum of the North American Paddlefish, supported by a lattice-like endoskeleton, is highly durable, making it an important candidate for bio-inspiration studies. Energy dissipation and load-bearing capacity of the structure from extreme physical force has been demonstrated superior to that of man-made systems, but response to continuous hydraulic forces is unknown and requires special instrumentation for in vivo testing on a live fish. A single supply strain gage amplifier circuit has been combined with a digital three-axis accelerometer, implemented in a printed circuit board (PCB), and integrated with the commercial-off-the-shelf Adafruit Feather M0 datalogger with a microSD card. The device is battery powered and enclosed in silicon before attachment around the rostrum with a silicon strap "watch band." As proof-of-concept, we tested the instrumentation on an amputated Paddlefish rostrum in a water-filled swim tunnel and successfully obtained interpretable data. Results indicate that this design could work on live swimming fish in future in vivo experiments.

show abstract

Hydrodynamic Characterization of thePolyodon spathulaRostrum Using CFD

Cited by 13 publications

References 17 publications

Control surfaces of aquatic vertebrates: active and passive design and function

Control surfaces of aquatic vertebrates: active and passive design and function

Early detection of failure mechanisms in resilient biostructures : a network flow study

Instrumenting Polyodon spathula (Paddlefish) Rostra in Flowing Water with Strain Gages and Accelerometers

Contact Info

Product

Resources

About