Terminal velocity and drag reduction measurements on superhydrophobic spheres

MCHALE, G., SHIRTCLIFFE, N.J., EVANS, C.R. and NEWTON, M.I., 2009. Terminal velocity and drag reduction measurements on superhydrophobic spheres. Applied Physics Letters, 94 (6).

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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: Journal article
Publication Title: Applied Physics Letters
Creators: McHale, G., Shirtcliffe, N.J., Evans, C.R. and Newton, M.I.
Publisher: American Institute of Physics
Date: 2009
Volume: 94
Number: 6
Rights: © 2009 American Institute of Physics
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:50
Last Modified: 09 Jun 2017 13:11
URI: http://irep.ntu.ac.uk/id/eprint/3564

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