Math. Model. Nat. Phenom.
Volume 7, Number 4, 2012Modelling phenomena on micro- and nanoscale
|Page(s)||82 - 98|
|Published online||09 July 2012|
Evaporation of Sessile Water Droplets in Presence of Contact Angle Hysteresis
Dept. of Chemical Engineering, Loughborough
3 TU Loughborough,
2 Dept. of Quimica Fisica I, Universidad Complutense, 28040 Madrid, Spain
3 Instituto Pluridisciplinar, Universidad Complutense, 28040 Madrid, Spain
∗ Corresponding author. E-mail: V.M.Starov@lboro.ac.uk
In this paper we present a theory describing the diffusion limited evaporation of sessile water droplets in presence of contact angle hysteresis. Theory describes two stages of evaporation process: (I) evaporation with a constant radius of the droplet base; and (II) evaporation with constant contact angle. During stage (I) the contact angle decreases from static advancing contact angle to static receding contact angle, during stage (II) the contact angle remains equal to the static receding contact angle. Universal dependences are deduced for both evaporation stages. Obtained universal curves are validated against available in the literature experimental data.
Mathematics Subject Classification: 76D05 / 76D45 / 76R50
Key words: evaporation / sessile droplets / contact angle hysteresis
© EDP Sciences, 2012
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