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论文类型：期刊论文

发表时间：2014-04-01

发表刊物：JOURNAL OF BIONIC ENGINEERING

收录刊物：SCIE、EI、ISTIC、CSCD、Scopus

卷号：11

期号：2

页面范围：296-302

ISSN号：1672-6529

关键字：hydrophobic property; micro-riblet; contact angle; shark skin

摘要：This paper aims to characterize the hydrophobic property of shark-skin-inspired riblets with potential engineering applications. Based on the hydrophobic theory, a new hydrophobic model which is consistent with the special structure of shark-skin-inspired micro-riblets was proposed. Then, the contact angles of different droplets were measured by optical contact angle measuring device on the shark-skin-inspired micro-riblets and the smooth surface, respectively. The results show that the surface of micro-riblets possesses obvious hydrophobicity, and the actual contact angles of different droplets residing on the riblets decrease with the increase in the droplet volume. According to the new hydrophobic model and the measurement of contact angle, it was found that the arrangement and structure of the shark-skin-inspired micro-riblets significantly affect the surface hydrophobic property. Using the new hydrophobic model, the prediction error of contact angle can be less than 3% compared with the measured one. The research on hydrophobic property of biomimetic micro-riblets is proved to be necessary and important to well explain drag reduction and microbe-resistant property of micro-riblets.