Modeling of fuel vapor jet eruption induced by local droplet heating

Handle URI:
http://hdl.handle.net/10754/564881
Title:
Modeling of fuel vapor jet eruption induced by local droplet heating
Authors:
Sim, Jaeheon ( 0000-0003-1441-7344 ) ; Im, Hong G. ( 0000-0001-7080-1266 ) ; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
The evaporation of a droplet by non-uniform heating is numerically investigated in order to understand the mechanism of the fuel-vapor jet eruption observed in the flame spread of a droplet array under microgravity condition. The phenomenon was believed to be mainly responsible for the enhanced flame spread rate through a droplet cloud at microgravity conditions. A modified Eulerian-Lagrangian method with a local phase change model is utilized to describe the interfacial dynamics between liquid droplet and surrounding air. It is found that the localized heating creates a temperature gradient along the droplet surface, induces the corresponding surface tension gradient, and thus develops an inner flow circulation commonly referred to as the Marangoni convection. Furthermore, the effect also produces a strong shear flow around the droplet surface, thereby pushing the fuel vapor toward the wake region of the droplet to form a vapor jet eruption. A parametric study clearly demonstrated that at realistic droplet combustion conditions the Marangoni effect is indeed responsible for the observed phenomena, in contrast to the results based on constant surface tension approximation
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Computational Reacting Flow Laboratory (CRFL); Combustion and Laser Diagnostics Laboratory
Publisher:
American Institute of Aeronautics and Astronautics (AIAA)
Journal:
52nd Aerospace Sciences Meeting
Conference/Event name:
52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
Issue Date:
10-Jan-2014
DOI:
10.2514/6.2014-1017
Type:
Conference Paper
ISBN:
9781624102561
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorSim, Jaeheonen
dc.contributor.authorIm, Hong G.en
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2015-08-04T07:23:59Zen
dc.date.available2015-08-04T07:23:59Zen
dc.date.issued2014-01-10en
dc.identifier.isbn9781624102561en
dc.identifier.doi10.2514/6.2014-1017en
dc.identifier.urihttp://hdl.handle.net/10754/564881en
dc.description.abstractThe evaporation of a droplet by non-uniform heating is numerically investigated in order to understand the mechanism of the fuel-vapor jet eruption observed in the flame spread of a droplet array under microgravity condition. The phenomenon was believed to be mainly responsible for the enhanced flame spread rate through a droplet cloud at microgravity conditions. A modified Eulerian-Lagrangian method with a local phase change model is utilized to describe the interfacial dynamics between liquid droplet and surrounding air. It is found that the localized heating creates a temperature gradient along the droplet surface, induces the corresponding surface tension gradient, and thus develops an inner flow circulation commonly referred to as the Marangoni convection. Furthermore, the effect also produces a strong shear flow around the droplet surface, thereby pushing the fuel vapor toward the wake region of the droplet to form a vapor jet eruption. A parametric study clearly demonstrated that at realistic droplet combustion conditions the Marangoni effect is indeed responsible for the observed phenomena, in contrast to the results based on constant surface tension approximationen
dc.publisherAmerican Institute of Aeronautics and Astronautics (AIAA)en
dc.titleModeling of fuel vapor jet eruption induced by local droplet heatingen
dc.typeConference Paperen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentComputational Reacting Flow Laboratory (CRFL)en
dc.contributor.departmentCombustion and Laser Diagnostics Laboratoryen
dc.identifier.journal52nd Aerospace Sciences Meetingen
dc.conference.date13 January 2014 through 17 January 2014en
dc.conference.name52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014en
dc.conference.locationNational Harbor, MDen
dc.contributor.institutionUniversity of Michigan, Ann Arbor, MI 48109, United Statesen
kaust.authorSim, Jaeheonen
kaust.authorIm, Hong G.en
kaust.authorChung, Suk-Hoen
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