Hits:

Indexed by:期刊论文

Date of Publication:2014-04-01

Journal:JOURNAL OF BIONIC ENGINEERING

Included Journals:SCIE、EI、ISTIC、CSCD、Scopus

Volume:11

Issue:2

Page Number:296-302

ISSN No.:1672-6529

Key Words:hydrophobic property; micro-riblet; contact angle; shark skin

Abstract: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.