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Universal evaporation dynamics of a confined sessile droplet

Bansal, Lalit and Hatte, Sandeep and Basu, Saptarshi and Chakraborty, Suman (2017) Universal evaporation dynamics of a confined sessile droplet. In: APPLIED PHYSICS LETTERS, 111 (10).

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Official URL: http://doi.org/10.1063/1.4996986

Abstract

Droplet evaporation under confinement is ubiquitous to multitude of applications such as microfluidics, surface patterning, and ink-jet printing. However, the rich physics governing the universality in the underlying dynamics remains grossly elusive. Here, we bring out hitherto unexplored universal features of the evaporation dynamics of a sessile droplet entrapped in a 3D confined fluidic environment. We show, through extensive set of experiments and theoretical formulations, that the evaporation timescale for such a droplet can be represented by a unique function of the initial conditions. Moreover, using same theoretical considerations, we are able to trace and universally merge the volume evolution history of the droplets along with evaporation lifetimes, irrespective of the extent of confinement. We also showcase the internal flow transitions caused by spatio-temporal variation of evaporation flux due to confinement. These findings may be of profound importance in designing functionalized droplet evaporation devices for emerging engineering and biomedical applications. Published by AIP Publishing.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 07 Oct 2017 06:07
Last Modified: 07 Oct 2017 06:07
URI: http://eprints.iisc.ac.in/id/eprint/57980

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