McHale, Glen, Shirtcliffe, Neil, Evans, Carl and Newton, Michael (2009) Terminal velocity and drag reduction measurements on superhydrophobic spheres. Applied Physics Letters, 94 (6). 064104. ISSN 0003-6951
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Abstract
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.
| Item Type: | Article |
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| Uncontrolled Keywords: | coatings, contact angle, drag reduction, drops, hydrophobicity, surface topography, water |
| Subjects: | F900 Others in Physical Sciences |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Ay Okpokam |
| Date Deposited: | 31 Jan 2012 16:56 |
| Last Modified: | 17 Dec 2023 12:33 |
| URI: | https://nrl.northumbria.ac.uk/id/eprint/5171 |
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