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dc.contributor.authorSim, Jaeheon
dc.contributor.authorIm, Hong G.
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2015-05-17T20:22:25Z
dc.date.available2015-05-17T20:22:25Z
dc.date.issued2015-05-12
dc.identifier.citationA computational study of droplet evaporation with fuel vapor jet ejection induced by localized heat sources 2015, 27 (5):053302 Physics of Fluids
dc.identifier.issn1070-6631
dc.identifier.issn1089-7666
dc.identifier.doi10.1063/1.4919809
dc.identifier.urihttp://hdl.handle.net/10754/552984
dc.description.abstractDroplet evaporation by a localized heat source under microgravity conditions was numerically investigated in an attempt to understand the mechanism of the fuel vapor jet ejection, which was observed experimentally during the flame spread through a droplet array. An Eulerian-Lagrangian method was implemented with a temperature-dependent surface tension model and a local phase change model in order to effectively capture the interfacial dynamics between liquid droplet and surrounding air. It was found that the surface tension gradient caused by the temperature variation within the droplet creates a thermo-capillary effect, known as the Marangoni effect, creating an internal flow circulation and outer shear flow which drives the fuel vapor into a tail jet. A parametric study demonstrated that the Marangoni effect is indeed significant at realistic droplet combustion conditions, resulting in a higher evaporation constant. A modified Marangoni number was derived in order to represent the surface force characteristics. The results at different pressure conditions indicated that the nonmonotonic response of the evaporation rate to pressure may also be attributed to the Marangoni effect.
dc.publisherAIP Publishing
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/pof2/27/5/10.1063/1.4919809
dc.rightsArchived with thanks to Physics of Fluids
dc.titleA computational study of droplet evaporation with fuel vapor jet ejection induced by localized heat sources
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Laser Diagnostics Laboratory
dc.contributor.departmentComputational Reacting Flow Laboratory (CRFL)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalPhysics of Fluids
dc.eprint.versionPublisher's Version/PDF
kaust.personSim, Jaeheon
kaust.personIm, Hong G.
kaust.personChung, Suk Ho
refterms.dateFOA2018-06-13T10:04:43Z
dc.date.published-online2015-05-12
dc.date.published-print2015-05


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