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Experimental investigation of a nonspherical water droplet falling in air

Authors :
Agrawal, Meenu
Katiyar, Rajat Kumar
Karri, Badarinath
Sahu, Kirti Chandra
Agrawal, Meenu
Katiyar, Rajat Kumar
Karri, Badarinath
Sahu, Kirti Chandra
Publication Year :
2020

Abstract

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.

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1257036416
Document Type :
Electronic Resource