阻力
生物污染
材料科学
聚二甲基硅氧烷
寄生阻力
结垢
还原(数学)
复合材料
海洋工程
工程类
航空航天工程
化学
数学
几何学
生物化学
膜
作者
Zeyu Ma,Jianbo Liu,Xiaodong Zhang,Ruoxi Deng,Shan Lu,Yuhao Wu,Liguo Qin,Guangneng Dong
标识
DOI:10.1016/j.colsurfa.2022.130233
摘要
The riblet structure on the surface of the shark skin provides significant drag reduction and fouling protection. Inspired by the structure of the shark skin, we present a direct ink writing protocol by modifying the rheological properties of polydimethylsiloxane to make it printable, and a series of flexible surfaces have been created with drag reduction and antifouling. The shear stress transport k–omega model was used as a suitable turbulence model for the numerical study to compare with results of drag reduction tests. Simulations and tests proved that printed non-smooth surfaces effectively reduced water drag, where the maximum drag reduction rate reached 18.16% at 0.06 m/s. Through the analysis of the characteristics of the flow field near the wall, the drag reduction mechanism of the riblet surface was examined. Moreover, the antifouling tests revealed that the printed surface exhibited excellent fouling resistance and inhibited the spread of dirt on the surface. Our findings may provide a new surface skinning strategy for ships, underwater vehicles and wearable devices to reduce drag and contaminant adhesion and improve navigation efficiency and longevity. • A convenient method for preparing commercial silicone rubber (Sylgard-184) that can be used for direct ink writing is presented. • Preparation of large flexible skins with integrated drag reduction and antifouling design. • The maximum drag reduction for printed non-smooth surfaces is 18.17%.
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