Numerical investigation on the evaporation of droplets depositing on heated surfaces at low Weber numbers

Strotos, G; Gavaises, M; Theodorakakos, A; Bergeles, G

dc.contributor.author	Strotos, G	en
dc.contributor.author	Gavaises, M	en
dc.contributor.author	Theodorakakos, A	en
dc.contributor.author	Bergeles, G	en
dc.date.accessioned	2014-03-01T01:28:53Z
dc.date.available	2014-03-01T01:28:53Z
dc.date.issued	2008	en
dc.identifier.issn	0017-9310	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19016
dc.subject	Droplet	en
dc.subject	Evaporation	en
dc.subject	Heated plate	en
dc.subject	VOF	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Computer simulation	en
dc.subject.other	Evaporation	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mass transfer	en
dc.subject.other	Stainless steel	en
dc.subject.other	Droplet volume regression	en
dc.subject.other	Heated surfaces	en
dc.subject.other	VOF methodology	en
dc.subject.other	Drops	en
dc.subject.other	Computer simulation	en
dc.subject.other	Drops	en
dc.subject.other	Evaporation	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mass transfer	en
dc.subject.other	Stainless steel	en
dc.title	Numerical investigation on the evaporation of droplets depositing on heated surfaces at low Weber numbers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijheatmasstransfer.2007.07.045	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.07.045	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The evaporation of water droplets, impinging with low Weber number and gently depositing on heated surfaces of stainless steel is studied numerically using a combination of fluid flow and heat transfer models. The coupled problem of heat transfer between the surrounding air, the droplet and the wall together with the liquid vaporisation from the droplet's free surface is predicted using a modified VOF methodology accounting for phase-change and variable liquid properties. The surface cooling during droplet's evaporation is predicted by solving simultaneously with the fluid flow and heat transfer equations, the heat conduction equation within the solid wall. The droplet's evaporation rate is predicted using a model from the kinetic theory of gases coupled with the Spalding mass transfer model, for different initial contact angles and substrate's temperatures, which have been varied between 20-90 degrees and 60-100 degrees C, respectively. Additionally, results from a simplified and computationally less demanding simulation methodology, accounting only for the heat transfer and vaporisation processes using a time-dependent but pre-described droplet shape while neglecting fluid flow are compared with those from the full solution. The numerical results are compared against experiments for the droplet volume regression, life time and droplet shape change, showing a good agreement. (C) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Heat and Mass Transfer	en
dc.identifier.doi	10.1016/j.ijheatmasstransfer.2007.07.045	en
dc.identifier.isi	ISI:000254725900003	en
dc.identifier.volume	51	en
dc.identifier.issue	7-8	en
dc.identifier.spage	1516	en
dc.identifier.epage	1529	en