Bio-replicated forming of the biomimetic drag-reducing surfaces in large area based on shark skin

• Published in: Chinese science bulletin Vol. 53; no. 10; pp. 1587 - 1592
• Main Authors: Han, Xin, Zhang, DeYuan, Li, Xiang, Li, YuanYue
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science in China Press 01.05.2008
• Subjects: Chemistry/Food Science; Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; Marine; multidisciplinary; Physics; Science; Science (multidisciplinary); 热压纹; 生物复制成型; 生物学; 鲨鱼皮; shark skin; biomimetic drag-reducing surface; hot embossing; bio-replicated forming
• ISSN: 1001-6538; 2095-9273; 1861-9541; 2095-9281
• DOI: 10.1007/s11434-008-0219-3

On the investigation of biomimetic drag-reducing surface, direct replication of the firm scarfskins on low-resistance creatures to form biomimetic drag-reducing surfaces with relatively vivid morphology relative to the living prototype is a new attempt of the bio-replicated forming technology. Taking shark skin as the bio-replication template, the hot embossing method was applied to the micro-replication of its outward morphology. Furthermore, the skins were jointed together to form the drag-reducing surface in large area. The results of the resistance measurements in a water tunnel according to the flat-plate sample pieces have shown that the biomimetic shark-skin coating fabricated by the bio-replicated forming method has significant drag reduction effect, and that the drag reduction efficiency reached 8.25% in the test conditions.