Terminal velocity and drag reduction measurements on superhydrophobic spheres
Terminal velocity and drag reduction measurements on superhydrophobic spheres
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DOI：
10.1063/1.3081420
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发表时间：
2009-02-09
影响因子：
4
通讯作者：
Newton, M. I.
中科院分区：
文献类型：
--
作者：
McHale, G.;Shirtcliffe, N. J.;Newton, M. I.
超疏水表面自然存在于植物和水生昆虫上，是在实验室通过将微米或纳米尺度的表面形貌特征与疏水表面化学相结合而创造出来的。当这种类型的憎水表面浸入水中时，它们可以保留一层空气(粘土膜)。在这项工作中，我们报告了不同表面处理的固体丙烯酸球在重力作用下在水中沉降的末端速度的测量。我们观察到终端速度的增加对应于携带Plaston的超疏水表面阻力减少5%至15%。
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.