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Water-trapping and drag-reduction effects of fish Ctenopharyngodon idellus scales and their simulations
Alternative TitleWater-trapping and drag-reduction effects of fish Ctenopharyngodon idellus scales and their simulations
Wu LiYan1; Jiao ZhiBin1; Song YuQiu1; Ren WenTao1; Niu ShiChao2; Han ZhiWu2
2017
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Volume60Issue:7Pages:1111-1117
AbstractIn the last decades, surface drag reduction has been re-emphasized because of its practical values in engineering applications, including vehicles, aircrafts, ships, and fuel pipelines. The bionic study of drag reduction has been attracting scholars' attentions. Here, it was determined that the delicate microstructures on the scales of the fish Ctenopharyngodon idellus exhibit remarkable drag-reduction effect. In addition, the underlying drag-reduction mechanism was carefully investigated. First, exceptional morphologies and structures of the scales were observed and measured using a scanning electron microscope and 3-dimensional (3D) microscope. Then, based on the acquired data, optimized 3D models were created. Next, the mechanism of the water-trapping effect of these structures was analyzed through numerical simulations and theoretical calculations. It was determined that there are many microcrescent units with certain distributions on its surface. In fact, these crescents are effective in generating the "water-trapping" effect and forming a fluid-lubrication film, thus reducing the skin friction drag effectively. Contrasting to a smooth surface, the dynamics finite-element analysis indicated that the maximum drag-reduction rate of a bionic surface is 3.014% at 0.66 m/s flow rate. This study can be used as a reference for an in-depth analysis on the bionic drag reduction of boats, underwater vehicles, and so forth.
Other AbstractIn the last decades, surface drag reduction has been re-emphasized because of its practical values in engineering applications, including vehicles, aircrafts, ships, and fuel pipelines. The bionic study of drag reduction has been attracting scholars' attentions. Here, it was determined that the delicate microstructures on the scales of the fish Ctenopharyngodon idellus exhibit remarkable drag-reduction effect. In addition, the underlying drag-reduction mechanism was carefully investigated. First, exceptional morphologies and structures of the scales were observed and measured using a scanning electron microscope and 3-dimensional (3D) microscope. Then, based on the acquired data, optimized 3D models were created. Next, the mechanism of the water-trapping effect of these structures was analyzed through numerical simulations and theoretical calculations. It was determined that there are many microcrescent units with certain distributions on its surface. In fact, these crescents are effective in generating the "water-trapping" effect and forming a fluid-lubrication film, thus reducing the skin friction drag effectively. Contrasting to a smooth surface, the dynamics finite-element analysis indicated that the maximum drag-reduction rate of a bionic surface is 3.014% at 0.66 m/s flow rate. This study can be used as a reference for an in-depth analysis on the bionic drag reduction of boats, underwater vehicles, and so forth.
KeywordNUMERICAL-SIMULATION SHARK SKIN BIONIC JET FLOW SURFACES POLYMERS water trapping structure drag reduction surface fish scales simulations bionic surface and interface
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Program for Excellent Talents of Liaoning Provincial Committee of Education]
CSCD IDCSCD:6041211
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/150851
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.吉林大学
Recommended Citation
GB/T 7714
Wu LiYan,Jiao ZhiBin,Song YuQiu,et al. Water-trapping and drag-reduction effects of fish Ctenopharyngodon idellus scales and their simulations[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2017,60(7):1111-1117.
APA Wu LiYan,Jiao ZhiBin,Song YuQiu,Ren WenTao,Niu ShiChao,&Han ZhiWu.(2017).Water-trapping and drag-reduction effects of fish Ctenopharyngodon idellus scales and their simulations.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,60(7),1111-1117.
MLA Wu LiYan,et al."Water-trapping and drag-reduction effects of fish Ctenopharyngodon idellus scales and their simulations".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 60.7(2017):1111-1117.
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