title: Water repellent/wetting characteristics of various bio-inspired morphologies and fluid drag reduction testing research.
abstract: It is well-known that the bio-inspired sharkskin covering the original pattern has the apparent drag reduction function in the turbulent flowing stations, which can be regarded as "sharkskin effect", and it has progressively been put application into the fluid engineering with obtaining great profits. In this paper, the anisotropic wetting phenomena on sharkskin are discovered, the contact angles and rolling angles on different orientations are not the same. In addition, the hydrodynamic experiments on different sharkskin surfaces are conducted, and the experimental results illustrate that the super-hydrophobic and drag-reducing properties on deformed biological surfaces are improved to some extent compared to the original morphology, which has important significance to expand its practical applications.
authors.affiliation: School of Engineering and Applied Science, The George Washington University, Washington D.C. 20052, USA. Electronic address: luoyuehao1985@163.com.
authors.forename: Yuehao
authors.initials: Y
authors.lastname: Luo
authors.affiliation: School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Song
authors.affiliation: School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Wang
mesh_terms: D000818:Animals; D016880:Anisotropy; D057446:Hydrodynamics; D057927:Hydrophobic and Hydrophilic Interactions; D012754:Sharks / Q000033:anatomy & histology*; D012867:Skin / Q000033:anatomy & histology / Q000648:ultrastructure*; D013499:Surface Properties; D017155:Wettability
keywords: Anisotropic wetting; Biological surface; Bionics; Low resistance surface; Micro-fabrication