Picture of flying drone

Award-winning sensor signal processing research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers involved in award-winning research into technology for detecting drones. - but also other internationally significant research from within the Department of Electronic & Electrical Engineering.

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

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

Dunn, Gavin and Wilson, S.K. and Duffy, B.R. and Sefiane, K. (2009) Evaporation of a thin droplet on a thin substrate with a high thermal resistance. Physics of Fluids, 21. ISSN 1070-6631

[img]
Preview
PDF (Dunn-etal-POF-2009-Evaporation-of-a-thin-droplet-on-a-thin)
Dunn_etal_POF_2009_Evaporation_of_a_thin_droplet_on_a_thin.pdf - Accepted Author Manuscript

Download (212kB) | Preview

Abstract

A mathematical model for the quasi-steady evaporation of a thin liquid droplet on a thin substrate that incorporates the dependence of the saturation concentration of vapour 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.