Marine drag reduction of shark skin inspired riblet surfaces

Fu, Yifeng; Yuan, Chengqing; Bai, Xiuqin

doi:10.1016/j.bsbt.2017.02.001

Cited by 134 publications

(79 citation statements)

References 44 publications

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“…Global studies on the surface groove technology of a mimetic shark started earlier and have already been applied to an aircraft surface [81]. However, such research began to be carried out later in China.…”

Section: Ocean Transportationmentioning

confidence: 99%

Advances in the application of biomimetic surface engineering in the oil and gas industry

Guo

Zhang

2019

Friction

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Friction is widespread in almost every field in the oil and gas industry, and it is accompanied by huge energy losses and potential safety hazards. To deal with a series of questions in this regard, biomimetic surfaces have been developed over the past decades to significantly reduce economic losses. Presently, biomimetic surface engineering on different scales has been successfully introduced into related fields of the oil and gas industry, such as drill bits and the inner surfaces of pipes. In this review, we focused on the most recent and promising efforts reported toward the application of a biomimetic surface in oil and gas fields, indicating the necessity and importance of establishing this disciplinary study. Regarding the oil and gas industry, we mainly analyzed and summarized some important research results into the following three aspects: (i) applications in reducing the wear of exploration production equipment and its components, (ii) separation and drag release technologies in oil/gas storage and transportation, and (iii) functional coatings used in oil and gas development in oceans and polar regions. Finally, based on an in-depth analysis of the development of biomimetic surface engineering in the fields of oil and gas, some conclusions and perspectives are also discussed. It is expected that biomimetic surface engineering can be used in oil and gas fields more widely and systematically, providing important contributions to green development in the near future.

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Section: Ocean Transportationmentioning

confidence: 99%

Advances in the application of biomimetic surface engineering in the oil and gas industry

Guo

Zhang

2019

Friction

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“…Nature, through the course of evolution, has arrived at structures and materials whose traits often offer inspiration for the design of synthetic systems with unique properties [18][19][20]. Specifically, biological systems have evolved a wide range of drag reducing mechanisms that have inspired the design of synthetic surfaces [18][19][20][21][22][23][24][25][26][27]. Shark skin is one such example and is covered with rigid bony denticles (or scales) that exhibit a plate-like upper section & 2018 The Author(s) Published by the Royal Society.…”

Section: Introductionmentioning

confidence: 99%

“…with ridges, which narrows to a thin neck that anchors into the skin (figure 1a,b). These intricate structures have inspired the development of several drag reducing surfaces [25], ranging from highly simplified ridge-like geometries [26,27] to complex three-dimensional (3D) printed models that replicate the structural complexities of individual denticles [21][22][23]. These denticle-inspired surfaces have resulted in a drag reduction of 10% compared to corresponding smooth control surfaces [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Shark skin-inspired designs that improve aerodynamic performance

Domel

Saadat

Weaver³

et al. 2018

J. R. Soc. Interface.

140

110

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There have been significant efforts recently aimed at improving the aerodynamic performance of aerofoils through the modification of their surfaces. Inspired by the drag-reducing properties of the tooth-like denticles that cover the skin of sharks, we describe here experimental and simulation-based investigations into the aerodynamic effects of novel denticle-inspired designs placed along the suction side of an aerofoil. Through parametric modelling to query a wide range of different designs, we discovered a set of denticle-inspired surface structures that achieve simultaneous drag reduction and lift generation on an aerofoil, resulting in lift-to-drag ratio improvements comparable to the best-reported for traditional low-profile vortex generators and even outperforming these existing designs at low angles of attack with improvements of up to 323%. Such behaviour is enabled by two concurrent mechanisms: (i) a separation bubble in the denticle's wake altering the flow pressure distribution of the aerofoil to enhance suction and (ii) streamwise vortices that replenish momentum loss in the boundary layer due to skin friction. Our findings not only open new avenues for improved aerodynamic design, but also provide new perspective on the role of the complex and potentially multifunctional morphology of shark denticles for increased swimming efficiency.

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“…A more promising approach to reduce drag is surface structuring. The shark skin is one famous structure and seems to be a promising alternative [5,6]. The Speedo R shark-skin swimsuit is certainly the most successful example; in the 2000 Summer Olympics in Sydney, 83% of medals were won by swimmers using this suit.…”

Section: Introductionmentioning

confidence: 99%

The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed

et al. 2020

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Paddle boats like canoes and kayaks draw a sinusoidal path when a linear movement is intended. The reason for this behavior is that each paddle stroke induces a lateral movement of the boat. In this study, we sought to reduce the so-called yawing motion. We therefore replaced the stiff stern by a flexible stern, which is based on the Fin Ray Effect R . We built down-scaled boat models and tested them in a water channel. The similarities between experimental and original setup were evaluated by means of a dimensional analysis. (Thermoplastic) elastomers with various flexibility were used for the stern construction. In the experiments conducted in the water channel, we determined the forces acting on the boat with different stern models. The results reveal that the flexible stern induced a torque counteracting the boat's deflection, while the stiff stern caused a torque enhancing it. A paddle boat with a flexible stern could hence be a promising new method to reduce the boat's yawing movement.

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Marine drag reduction of shark skin inspired riblet surfaces

Cited by 134 publications

References 44 publications

Advances in the application of biomimetic surface engineering in the oil and gas industry

Advances in the application of biomimetic surface engineering in the oil and gas industry

Shark skin-inspired designs that improve aerodynamic performance

The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed

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