Experimental analysis of shape deformation of evaporating droplet using Legendre polynomials

Sanyal, Apratim and Basu, Saptarshi and Kumar, Ranganathan (2014) Experimental analysis of shape deformation of evaporating droplet using Legendre polynomials. In: PHYSICS LETTERS A, 378 (5-6). pp. 539-548.

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Abstract

Experiments involving heating of liquid droplets which are acoustically levitated, reveal specific modes of oscillations. For a given radiation flux, certain fluid droplets undergo distortion leading to catastrophic bag type breakup. The voltage of the acoustic levitator has been kept constant to operate at a nominal acoustic pressure intensity, throughout the experiments. Thus the droplet shape instabilities are primarily a consequence of droplet heating through vapor pressure, surface tension and viscosity. A novel approach is used by employing Legendre polynomials for the mode shape approximation to describe the thermally induced instabilities. The two dominant Legendre modes essentially reflect (a) the droplet size reduction due to evaporation, and (b) the deformation around the equilibrium shape. Dissipation and inter-coupling of modal energy lead to stable droplet shape while accumulation of the same ultimately results in droplet breakup. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	PHYSICS LETTERS A
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	copyright for this article belongs to ELSEVIER SCIENCE BV, NETHERLANDS
Keywords:	Laser heating; Droplet instability; Legendre polynomial
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	19 Mar 2014 04:59
Last Modified:	19 Mar 2014 04:59
URI:	http://eprints.iisc.ac.in/id/eprint/48640

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