title: Kinetics of Evaporation of Pinned Nanofluid Volatile Droplets at Subatmospheric Pressures.
abstract: We examine the effects of nanoparticle addition at low concentration on the evaporation kinetics of droplets in the constant radius mode. The evaporative behavior of deionized water and Al2O3 nanoparticle laden water on an aluminum substrate was observed at atmospheric and at different subatmospheric pressures. The two fluids exhibit the same evaporative behavior, independent of the droplet volume or the subatmospheric pressure. Moreover, the linear relationship between evaporation rate and droplet radius, initially proposed by Picknett and Bexon nearly four decades ago for droplets evaporating in the constant radius mode, is satisfied for both liquids. In addition, we have established a unified correlation solely function of fluid properties that extends this relationship to any subatmospheric pressure and fluid tested. We conclude that the addition of a small quantity of nanoparticles to the base fluid does not modify the kinetics of evaporation for pinned volatile droplets.
authors.affiliation: School of Engineering, The University of Edinburgh , King's Buildings, Mayfield Road, Edinburgh EH9 3JL, United Kingdom.
authors.forename: Daniel
authors.initials: D
authors.lastname: Orejon
authors.affiliation: University of Bordeaux, I2M, UMR 5295, F-33400 Talence, France.|CNRS, I2M, UMR 5295, F-33400 Talence, France.|Arts et Metiers ParisTech, I2M, UMR 5295, F-33400 Talence, France.
authors.forename: Martin E R
authors.initials: ME
authors.lastname: Shanahan
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Takata
authors.affiliation: School of Engineering, The University of Edinburgh , King's Buildings, Mayfield Road, Edinburgh EH9 3JL, United Kingdom.
authors.forename: Khellil
authors.initials: K
authors.lastname: Sefiane