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On the lifetime of evaporating confined sessile droplets
S. Hatte, R. Dhar, , S. Chakraborty, S. Basu
Published in Elsevier B.V.
Volume: 560
Pages: 78 - 83
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. © 2018 Elsevier B.V.
About the journal
JournalData powered by TypesetColloids and Surfaces A: Physicochemical and Engineering Aspects
PublisherData powered by TypesetElsevier B.V.