Nonwetting of impinging droplets on textured surfaces

被引：405

作者：

Deng, Tao ^{[1
]}

Varanasi, Kripa K. ^{[2
]}

Hsu, Ming ^{[1
]}

Bhate, Nitin ^{[1
]}

Keimel, Chris ^{[1
]}

Stein, Judith ^{[1
]}

Blohm, Margaret ^{[1
]}

机构：

[1] GE Global Res Ctr, Niskayuna, NY 12309 USA

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 13期

关键词：

drops; hydrophobicity; surface texture; wetting; LIQUID IMPACT; TRANSITIONS;

D O I：

10.1063/1.3110054

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper studies the impinging droplets on superhydrophobic textured surfaces and proposes a design guideline for nonwetting surfaces under droplet impingement. A new wetting pressure, the effective water hammer pressure, is introduced in the study to clearly define wetting states for the impinging droplets. This approach establishes the design criteria for nonwetting surfaces to impinging droplets. For impingement speed higher than raindrop speed, the surfaces need to have sub-100-nm features to generate a large enough antiwetting pressure for the droplets to take a nonwetting state after impingement.

引用

页数：3

共 22 条

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