Terminal velocity and drag reduction measurements on superhydrophobic spheres

被引：135

作者：

McHale, G. ^{[1
]}

Shirtcliffe, N. J. ^{[1
]}

Evans, C. R. ^{[1
]}

Newton, M. I. ^{[1
]}

机构：

[1] Nottingham Trent Univ, Sch Sci & Technol, Nottingham NG11 8NS, England

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

coatings; contact angle; drag reduction; drops; hydrophobicity; surface topography; water; SURFACES;

D O I：

10.1063/1.3081420

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Super water-repellent surfaces occur naturally on plants and aquatic insects and are created in the laboratory by combining micro- or nanoscale surface topographic features with hydrophobic surface chemistry. When such types of water-repellent surfaces are submerged they can retain a film of air (a plastron). In this work, we report measurements of the terminal velocity of solid acrylic spheres with various surface treatments settling under the action of gravity in water. We observed increases in terminal velocity corresponding to drag reduction of between 5% and 15% for superhydrophobic surfaces that carry plastrons.

引用

页数：3

共 14 条

[1]

Purity of the sacred lotus, or escape from contamination in biological surfaces [J].