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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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 |
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Publication: | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS |
Publisher: | ELSEVIER SCIENCE BV |
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 |
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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