著者

長谷川 雅人 小山 直路 龍瀧 浩三 上野 久儀

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2003, no.2, pp.377-378, 2003-08-05

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We investigated the drag reduction phenomena on highly water repellent surfaces, which have micron to sub-millimeter order of projections at several intervals of the same order. The most significant drag reduction in the present work was achieved on the surface of the largest structure among those of the constant concavo-convex ratio. The ability to hold the air layer in water depends on both the size and the ratio of concavo-convex structure. The water-repellency of these surfaces in bulk water didn't match that estimated from the contact angle of water droplet on the surface in ambient air.