Experimental Study of Shape Transition in an Acoustically Levitated and Externally Heated Droplet

Pathak, Binita and Sanyal, Apratim and Basu, Saptarshi (2015) Experimental Study of Shape Transition in an Acoustically Levitated and Externally Heated Droplet. In: JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 137 (12, SI).

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Abstract

Experimental analyses of surface oscillations are reported in acoustically levitated, radiatively heated bicomponent droplets with one volatile and other being nonvolatile. Two instability pathways are observed: one being acoustically driven observed in low-vapor pressure fluid droplets and other being boiling driven observed in high-vapor pressure fluid droplets. The first pathway shows extreme droplets deformation and subsequent breakup by acoustic pressure and externally supplied heat. Also transition of instabilities from acoustically activated shape distortion regime to thermally induced boiling regime is observed with increasing concentration of volatile component in bicomponent droplets. Precursor phases of instabilities are investigated using Legendre's polynomial.

Item Type:	Journal Article
Publication:	JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
Publisher:	ASME
Additional Information:	Copy right for this article belongs to the ASME, TWO PARK AVE, NEW YORK, NY 10016-5990 USA
Keywords:	bicomponent droplet; acoustic levitation; instabilities; oscillation modes
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	10 Dec 2015 05:48
Last Modified:	10 Dec 2015 05:48
URI:	http://eprints.iisc.ac.in/id/eprint/52861

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