Bionic research on fish scales for drag reduction

  title={Bionic research on fish scales for drag reduction},
  author={Zhaoliang Dou and Jiadao Wang and Darong Chen},
  journal={Journal of Bionic Engineering},
To reduce friction drag with bionic method in a more feasible way, the surface microstructure of fish scales was analyzed attempting to reveal the biologic features responding to skin friction drag reduction. Then comparable bionic surface mimicking fish scales was fabricated through coating technology for drag reduction. The paint mixture was coated on a substrate through a self-developed spray-painting apparatus. The bionic surface with micron-scale caves formed spontaneously due to the… Expand
Experimental investigations on drag-reduction characteristics of bionic surface with water-trapping microstructures of fish scales
The drag-reduction characteristics of the bionic surface with delicate water-trapping microstructures of fish Ctenopharyngodon idellus scales were explored by experimental method and it was discovered that the bionics created a rewarding drag- reduction effect at a low speed, and the drag-Reduction rate significantly displayed a downward trend with the increase in flow speed. Expand
Drag reduction through self-texturing compliant bionic materials
The drag testing results show that the compliant n-octadecane film is more effectively in drag reduction than superhydrophobic ZnO/PDMS film, indicating that the drag reduction mechanism of n- octade cane is significantly different with superHydrophobic film. Expand
Skin Friction Reduction Characteristics of Nonsmooth Surfaces Inspired by the Shapes of Barchan Dunes
A new type of nonsmooth surface inspired by the shape of barchan dunes has been proposed and is intended to reduce skin friction, a major cause of overall drag. Simulations were carried out to obtainExpand
An investigation on the drag reduction performance of bioinspired pipeline surfaces with transverse microgrooves
It was found that the vortex ‘cushioning’ and ‘driving’ effects produced by the vortexes in the microgrooves were the main reason for obtaining a drag reduction effect. Expand
One-step method using laser for large-scale preparation of bionic superhydrophobic & drag-reducing fish-scale surface
Abstract In this study, four bionic fish-scale models were extracted and produced based on the microscopic morphology and the arrangement of scales on the body of Sciaenops ocellatus. A simple, quickExpand
Research on the drag reduction property of puffer (Takifugu flavidus) spinal nonsmooth structure surface
The results lay a foundation for further research and optimization of drag reduction ability of nonsmooth surface of bionic spines. Expand
Progress and Perspective of Studies on Biomimetic Shark Skin Drag Reduction
Shark skin surfaces of fast-swimming sharks are characterized as non-smooth because of the presence of dermal denticles or riblet structures and exhibit an excellent drag-reduction effect. A reviewExpand
Drag reduction effect of ultraviolet laser-fabricated superhydrophobic surface
ABSTRACT Superhydrophobic (SH) surface has been found effective for drag reduction in wall-bounded turbulence for decades, especially the metallic durable SH surfaces are believed very promising forExpand
Research on drag reduction performance of turbulent boundary layer on bionic jet surface
Based on the fact that jet formed in outer gill of sharks can reduce the wall friction during the breath process, a bionic jet surface model was established. The numerical simulations were carriedExpand
Frictional Damping from Biomimetic Scales
This study investigates the dynamic behavior of biomimetic scale substrates for further understanding the origins of the nonlinearity that involve various aspect of scales interaction, sliding kinematics, interfacial friction, and their combination and indicates a biomimetically strategy to design exceptional synthetic materials with tailorable damping behavior. Expand


Body surface adaptations to boundary-layer dynamics.
  • J. Videler
  • Materials Science, Medicine
  • Symposia of the Society for Experimental Biology
  • 1995
This paper concentrates on reduction of drag due to friction in the boundary layer close to the body surface for fast, pelagic, predatory fish species and the surface structure of the sword of a swordfish is shown to be both rough and porous. Expand
Fluid Mechanics of Biological Surfaces and their Technological Application
It is demonstrated that the results of investigations aiming at technological applications can also provide insights into biophysical phenomena and techniques for reducing wall shear stresses and for controlling boundary-layer separation are described. Expand
Microtribology of biological materials
This paper presents a study on friction and indentation of attachment pads of the great green bush cricket, using a system involving a biological material and a flat surface. The pads areExpand
Experiment about drag reduction of bionic non-smooth surface in low speed wind tunnel
The body surface of some organisms has non-smooth structure, which is related to drag reduction in moving fluid. To imitate these structures, models with a non-smooth surface were made. In order toExpand
Active turbulence control for drag reduction in wall-bounded flows
The objective of this study is to explore concepts for active control of turbulent boundary layers leading to skin-friction reduction using the direct numerical simulation technique. Significant dragExpand
Active wall motions for skin-friction drag reduction
In the present study we investigate a possibility of reducing skin-friction drag in a turbulent channel flow with active wall motions. The wall is locally deformed according to two successful controlExpand
Progress in the bionic study on anti-adhesion and resistance reduction of terrain machines
The theoretical studies of bionics of machinery have great scientific significance, and the development of bionic machines has large practical values in the field of engineering and technology.Expand
Riblets as a Viscous Drag Reduction Technique
T viscous drag of turbulent boundary layers is a significant factor contributing to the fuel costs of the airlines. Several studies have indicated that microsurface geometry variations which changeExpand
Time-resolved light scattering studies of phase separation in thin film semiconducting polymer blends during spin-coating
Thin films of blends of incompatible semiconducting polymers find technological applications in organic electronic devices, such as LEDs and photovoltaics, where a more efficient device can beExpand
Interfacial instability in bilayer films due to solvent evaporation
  • M. Souche, N. Clarke
  • Materials Science, Medicine
  • The European physical journal. E, Soft matter
  • 2009
We perform a linear analysis of the Marangoni instability of a deformable interface between two fluid layers of finite depths, submitted to a gradient of solvent concentration induced by evaporationExpand