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On the lifetime of evaporating confined sessile droplets

Hatte, Sandeep and Dhar, Riju and Bansal, Lalit and Chakraborty, Suman and Basu, Saptarshi (2019) On the lifetime of evaporating confined sessile droplets. In: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 560 . pp. 78-83.

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Official URL: http://dx.doi.org/10.1016/j.colsurfa.2018.10.008

Abstract

Confinement effects may trigger certain non-trivial characteristics of droplet evaporation, which may incur far-reaching implications in practical scenarios. In effect, the vapor mediated interactions in a confined droplet may alter its intrinsic evaporation characteristics altogether, primarily as a consequence of significant increase in droplet lifetime due to enriched accumulation of the vapor field in the vicinity. Here, we derive a universal scaling law for the evaporation lifetime of a geometrically confined sessile droplet, appropriate to a wide gamut of droplet-substrate combinations. With asymptotic convergence to the classical picture in case of an unconfined droplet, the validity of our scaling law for droplet lifetime is comprehensively tested and benchmarked against a wide range of experimental data sets. These findings may turn out to be of profound importance in several emerging applications including micro-scale combustion and droplet based microfluidic technology.

Item Type: Journal Article
Additional Information: Copy right for this article belong to ELSEVIER SCIENCE BV
Keywords: Droplet evaporation; Lifetime scaling; Confinement; Vapor mediated
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 06 Dec 2018 10:55
Last Modified: 06 Dec 2018 10:55
URI: http://eprints.iisc.ac.in/id/eprint/61203

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