Drag reduction effect of ultraviolet laser-fabricated superhydrophobic surface

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 for improving the velocity and voyage of marine vehicles. We present stainless steel SH surfaces with U-groove pat...

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Bibliographic Details
Published inSurface engineering Vol. 36; no. 12; pp. 1307 - 1314
Main Authors Zhao, Xiuju, Xue, Yao, Yang, Huan, Xue, Wei, Li, Fengping, He, An, Cao, Yu
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.12.2020
SAGE Publications
Subjects
drag reduction
laser texturing
stainless steel
Superhydrophobic surface
drag reduction
laser texturing
Superhydrophobic surface
stainless steel
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Summary: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 for improving the velocity and voyage of marine vehicles. We present stainless steel SH surfaces with U-groove patterns that fabricated by ultraviolet laser texturing and coating modifier treatment. The drag-reducing effects of the SH surfaces are tested by a self-built gravity sliding speed improving evaluation device. The results show that the different drag-reduction performance of the SH surfaces can be achieved by adjusting the line spacing of the crossing U-groove patterns. With the line spacing equalling to 80 μm, the ultraviolet laser textured stainless steel SH surface acquires the static contact angle of 161.5° and the dynamic sliding angle of only 2°, which leads to the maximum speed improving rate of 29.7%.
ISSN:0267-0844
1743-2944
DOI:10.1080/02670844.2018.1560911