Experimental investigation of a nonspherical water droplet falling in air
Agrawal, Meenu and Katiyar, Rajat Kumar and Karri, Badarinath and Sahu, Kirti Chandra (2020) Experimental investigation of a nonspherical water droplet falling in air. Physics of Fluids, 32 (11). p. 112105. ISSN 1070-6631
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We experimentally investigate the shape oscillations of an initially nonspherical water droplet falling in air using high-speed imaging. We design a customized experimental setup that allows us to study the freely falling droplets of initially oblate/prolate/tilted configurations. The setup uses a pneumatic piston-cylinder arrangement and a superhydrophobically coated plate to propel a droplet upwards in air whose motion is then recorded using a high-speed camera. Due to the propulsive force imparted to the droplet, it undergoes oblate-prolate oscillations and eventually comes to rest at a maximum height, at which time the droplet has a zero vertical velocity and a nonspherical shape with an inclination to the horizontal. We study the effect of the initial aspect ratio and size of the droplet on its shape oscillations during its downward motion.
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Item Type: | Article | ||||
Uncontrolled Keywords: | Experimental investigations, Falling droplet, High speed imaging Nonspherical shapes, Pneumatic pistons Propulsive forces, Shape oscillation,Vertical velocity | ||||
Subjects: | Chemical Engineering Chemical Engineering > Fluid Mechanics Chemical Engineering > Explosives, fuels, related products Chemical Engineering > Oils, fats, waxes, gases Chemical Engineering > Ceramic and allied technologies Chemical Engineering > Cleaning, color, coating, related technologies Chemical Engineering > Organic products Chemical Engineering > Biochemical Engineering |
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Divisions: | Department of Chemical Engineering | ||||
Depositing User: | . LibTrainee 2021 | ||||
Date Deposited: | 27 May 2021 10:39 | ||||
Last Modified: | 27 May 2021 10:39 | ||||
URI: | http://raiith.iith.ac.in/id/eprint/7853 | ||||
Publisher URL: | http://doi.org/10.1063/5.0031642 | ||||
OA policy: | https://v2.sherpa.ac.uk/id/publication/9872 | ||||
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