Performance evaluation of humpback whale-inspired shortboard surfing fins based on ocean wave fieldwork

Shormann, David E.; Panhuis, Marc in het

doi:10.1371/journal.pone.0232035

Cited by 8 publications

(6 citation statements)

References 33 publications

(61 reference statements)

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“…While the shape and movement of dolphins continue to be a source of inspiration 127,138 , finned fishes too have drawn intense interest [139][140][141] , as have sharks 142,143 and rays 144,145 . The fluid mechanics associated with rounded tubercles on the flippers of humpback whales have inspired design both below and above water, most notably in the shape of wind turbines, tidal turbines and even surfboards 62,63,146,147 , while the flexible waving of macroalgae has led to the development of kelp-inspired wave energy generators 148 . The body design and propulsive systems of other marine life have inspired additional libraries of biomimetic design, including the jet propulsion and shape of squids 57,[149][150][151] and other mollusks 152 , the movement of siphonophores 153,154 , and the bell shape and contractions of jellyfish 57,131,149,[155][156][157] .…”

Section: Movementmentioning

confidence: 99%

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

et al. 2022

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The morphology, physiology and behavior of marine organisms have been a valuable source of inspiration for solving conceptual and design problems. Here, we introduce this rich and rapidly expanding field of marine biomimetics, and identify it as a poorly articulated and often overlooked element of the ocean economy associated with substantial monetary benefits. We showcase innovations across seven broad categories of marine biomimetic design (adhesion, antifouling, armor, buoyancy, movement, sensory, stealth), and use this framing as context for a closer consideration of the increasingly frequent focus on deep-sea life as an inspiration for biomimetic design. We contend that marine biomimetics is not only a “forgotten” sector of the ocean economy, but has the potential to drive appreciation of non-monetary values, conservation and stewardship, making it well-aligned with notions of a sustainable blue economy. We note, however, that the highest ambitions for a blue economy are that it not only drives sustainability, but also greater equity and inclusivity, and conclude by articulating challenges and considerations for bringing marine biomimetics onto this trajectory.

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Section: Movementmentioning

confidence: 99%

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

et al. 2022

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“…That is, the fluid t  is not allowed to cross the adjacent cells within the step length. In order to ensure a certain degree of safety, it is t  selected to be about a quarter of the right-hand term of the above formula [5][6].…”

Section: Numerical Stability--convergence Conditionsmentioning

confidence: 99%

Dynamic Calculation of Waves in Ocean Engineering Based on Damping Waves

2022

FOE

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With the development of numerical computer simulation technology, the application of numerical wave troughs to simulate the motion and deformation of waves and their interaction with the ground has become an important development direction of computational fluid dynamics. The purpose of this paper is to study the dynamic calculation of waves in marine engineering based on damping waves. In this paper, the study of the irregular wave reflection of numerical wave flow is based on the VOF method. Taking the turbulent motion-Reynolds equation as the governing equation, the negative work technique is used in the near-wall region. The active receiver is placed on the left side of the waveform generator. The absorbing effects of different attenuation coefficient sponge layers and the effects of different attenuation coefficient power ratios on water reflection in the tank were compared. Good cleaning power. It can be seen from the spatial distribution of the wave surface height in the water tank along the water tank that the selected attenuation coefficient of the sponge layer can reduce the traveling wave in this region by one to two times the length and width. The spectra under different reservoir conditions are in good agreement with the target. The numerical calculation results show that the wave sponge cold resistance technology adopted in this paper can avoid the reflection at the output boundary. Combined with the active wave generation technology, the irregular wave based on the VOF method does not show the numerical groove of the wave.

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“…Field research materials and methods are discussed in more detail elsewhere [1,5,6]. The research involved surfers of 4 different skill levels as defined in Reference [7], including intermediate (Level 6), expert (Levels 7 and 8) and WCT, or World Surf League Men's World Championship Tour (Level 9).…”

Section: Field Researchmentioning

confidence: 99%

Field Research and Numerical CFD Analysis of Humpback Whale-Inspired Shortboard Fins

Shormann

Panhuis

Oggiano

2020

The 13th Conference of the International Sports Engineering Association

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Compared to other Olympic sports, little research exists on competitive shortboard surfing—especially research comparing field and numerical data. In this paper, GPS sensors with 9-axis motion sensors were used to collect data on nearly 2000 surfed waves. Data were collected from four surfers of differing skill levels, ranging from intermediate/advanced (Level 6) to top-ranked professional (Level 9). The results revealed a positive correlation between surfer skill level and roll/pitch/yaw rates during a cutback. Some surfers used two different fin types: a standard commercial fin (C), and a 3D-printed, humpback whale-inspired fin (RW). Statistically significant cutback performance improvements were seen when surfers used the RW fin. Because of the skill level differences suggested by the field data, dynamic computational fluid dynamics (CFD) analysis was performed to simulate cutback maneuvers at three different rotation rates (roll/pitch/yaw). Sustained resultant forces relative to the rider direction were lower for RW fins during the turn, suggesting a less-skilled surfer could generate faster and more powerful turns using RW fins. Field results also confirmed that a skill Level 8 surfer performed closer to skill Level 9 when using RW fins, but not control fins. Surfers experienced more stability using RW fins, and CFD results confirmed RW’s ability to dampen the effects of turbulent flow.

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Performance evaluation of humpback whale-inspired shortboard surfing fins based on ocean wave fieldwork

Cited by 8 publications

References 33 publications

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

Dynamic Calculation of Waves in Ocean Engineering Based on Damping Waves

Field Research and Numerical CFD Analysis of Humpback Whale-Inspired Shortboard Fins

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