Vortex-Induced Vapor Explosion during Drop Impact on a Superheated Pool

Handle URI:
http://hdl.handle.net/10754/623268
Title:
Vortex-Induced Vapor Explosion during Drop Impact on a Superheated Pool
Authors:
Alchalabi, M.A.; Kouraytem, N.; Li, E.Q.; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 )
Abstract:
Ultra high-speed imaging is used to investigate the vapor explosion when a drop impacts onto a high-temperature pool. The two liquids are immiscible, a low boiling-temperature perfluorohexane drop, at room temperature, which impacts a high boiling-temperature soybean-oil pool, which is heated well above the boiling temperature of the drop. We observe different regimes: weak and strong nucleate boiling, film boiling or Leidenfrost regime and entrainment followed by vapor explosion. The vapor explosions were seen to depend on the formation of a rotational flow at the edge of the impact crater, near the pool surface, which resembles a vortex ring. This rotational motion entrains a thin sheet of the drop liquid, to become surrounded by the oil. In that region, the vapor explosion starts at a point after which it propagates azimuthally along the entire periphery at high speed.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center
Citation:
Alchalabi MA, Kouraytem N, Li EQ, Thoroddsen ST (2017) Vortex-Induced Vapor Explosion during Drop Impact on a Superheated Pool. Experimental Thermal and Fluid Science. Available: http://dx.doi.org/10.1016/j.expthermflusci.2017.04.019.
Publisher:
Elsevier BV
Journal:
Experimental Thermal and Fluid Science
KAUST Grant Number:
FCC/1/1975
Issue Date:
18-Apr-2017
DOI:
10.1016/j.expthermflusci.2017.04.019
Type:
Article
ISSN:
0894-1777
Sponsors:
MAA and NK contributed equally to this study. The research reported herein was supported by KAUST research funding. We acknowledge experimental advice from Ivan U. Vakarelski. We thank Tadd T. Truscott for help with the glass container fabrication. NK acknowledges partial support from the Clean Combustion Research Center, under CCF Extreme Combustion FCC/1/1975.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S089417771730122X
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorAlchalabi, M.A.en
dc.contributor.authorKouraytem, N.en
dc.contributor.authorLi, E.Q.en
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.date.accessioned2017-04-20T08:08:16Z-
dc.date.available2017-04-20T08:08:16Z-
dc.date.issued2017-04-18en
dc.identifier.citationAlchalabi MA, Kouraytem N, Li EQ, Thoroddsen ST (2017) Vortex-Induced Vapor Explosion during Drop Impact on a Superheated Pool. Experimental Thermal and Fluid Science. Available: http://dx.doi.org/10.1016/j.expthermflusci.2017.04.019.en
dc.identifier.issn0894-1777en
dc.identifier.doi10.1016/j.expthermflusci.2017.04.019en
dc.identifier.urihttp://hdl.handle.net/10754/623268-
dc.description.abstractUltra high-speed imaging is used to investigate the vapor explosion when a drop impacts onto a high-temperature pool. The two liquids are immiscible, a low boiling-temperature perfluorohexane drop, at room temperature, which impacts a high boiling-temperature soybean-oil pool, which is heated well above the boiling temperature of the drop. We observe different regimes: weak and strong nucleate boiling, film boiling or Leidenfrost regime and entrainment followed by vapor explosion. The vapor explosions were seen to depend on the formation of a rotational flow at the edge of the impact crater, near the pool surface, which resembles a vortex ring. This rotational motion entrains a thin sheet of the drop liquid, to become surrounded by the oil. In that region, the vapor explosion starts at a point after which it propagates azimuthally along the entire periphery at high speed.en
dc.description.sponsorshipMAA and NK contributed equally to this study. The research reported herein was supported by KAUST research funding. We acknowledge experimental advice from Ivan U. Vakarelski. We thank Tadd T. Truscott for help with the glass container fabrication. NK acknowledges partial support from the Clean Combustion Research Center, under CCF Extreme Combustion FCC/1/1975.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S089417771730122Xen
dc.rights© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectImmiscibleen
dc.subjectVortex ringen
dc.subjectVapor explosionen
dc.subjectNucleate boilingen
dc.subjectFilm boilingen
dc.subjectLeidenfrost regimeen
dc.titleVortex-Induced Vapor Explosion during Drop Impact on a Superheated Poolen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalExperimental Thermal and Fluid Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionPower Systems Renewables Department, Saudi Aramco, 31311, Dhahran, Saudi Arabiaen
kaust.authorAlchalabi, M.A.en
kaust.authorKouraytem, N.en
kaust.authorLi, E.Q.en
kaust.authorThoroddsen, Sigurdur T.en
kaust.grant.numberFCC/1/1975en
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