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Evaporation of a thin droplet on a thin substrate with a high thermal resistance

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    Rights statement: Dunn, G., Wilson, S. K., Duffy, B., & Sefiane, K. (2009). Evaporation of a Thin Droplet on a Thin Substrate with a High Thermal Resistance. Physics of Fluids, 21, 52101

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Original languageEnglish
Article number052101
Number of pages7
JournalPhysics of Fluids
Volume21
Issue number5
DOIs
Publication statusPublished - May 2009

Abstract

A mathematical model for the quasisteady evaporation of a thin liquid droplet on a thin substrate that incorporates the dependence of the saturation concentration of vapor at the free surface of the droplet on temperature is used to examine an atypical situation in which the substrate has a high thermal resistance relative to the droplet (i.e., it is highly insulating and/or is thick relative to the droplet). In this situation diffusion of heat through the substrate is the rate-limiting evaporative process and at leading order the local mass flux is spatially uniform, the total evaporation rate is proportional to the surface area of the droplet, and the droplet is uniformly cooled. In particular, the qualitative differences between the predictions of the present model in this situation and those of the widely used "basic" model in which the saturation concentration is independent of temperature are highlighted.

    Research areas

  • drops, evaporation, heat transfer, SESSILE DROPLET, CONTACT-ANGLE, MODEL, FLOW

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