Thermally induced secondary atomization of droplet in an acoustic field

Basu, Saptarshi and Saha, Abhishek and Kumar, Ranganathan (2012) Thermally induced secondary atomization of droplet in an acoustic field. In: Applied Physics Letters, 100 (5).

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Abstract

We study the thermal effects that lead to instability and break up in acoustically levitated vaporizing fuel droplets. For selective liquids, atomization occurs at the droplet equator under external heating. Short wavelength [Kelvin-Helmholtz (KH)] instability for diesel and bio-diesel droplets triggers this secondary atomization. Vapor pressure, latent heat, and specific heat govern the vaporization rate and temperature history, which affect the surface tension gradient and gas phase density, ultimately dictating the onset of KH instability. We develop a criterion based on Weber number to define a condition for the inception of secondary atomization. (C) 2012 American Institute of Physics. [doi:10.1063/1.3680257]

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	02 Mar 2012 11:09
Last Modified:	02 Mar 2012 11:14
URI:	http://eprints.iisc.ac.in/id/eprint/43707

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