Multiphase computational fluid dynamics–conjugate heat transfer for spray cooling in the non-boiling regime.

Hdl Handle:
http://hdl.handle.net/10545/622133
Title:
Multiphase computational fluid dynamics–conjugate heat transfer for spray cooling in the non-boiling regime.
Authors:
Langari, Mostafa; Yang, Zhiyin ( 0000-0002-6629-1360 ) ; Dunne, Julian F.; Jafari, Soheil; Pirault, Jean-Pierre; Long, Chris A.; Jose, JT
Abstract:
A numerical study is described to predict, in the non-boiling regime, the heat transfer from a circular flat surface cooled by a full-cone spray of water at atmospheric pressure. Simulations based on coupled computational fluid dynamics and conjugate heat transfer are used to predict the detailed features of the fluid flow and heat transfer for three different spray conditions involving three mass fluxes between 3.5 and 9.43 kg/m2s corresponding to spray Reynolds numbers between 82 and 220, based on a 20 mm diameter target surface. A two-phase Lagrange–Eulerian modelling approach is adopted to resolve the spray-film flow dynamics. Simultaneous evaporation and condensation within the fluid film is modelled by solving the mass conservation equation at the film–continuum interface. Predicted heat transfer coefficients on the cooled surface are compared with published experimental data showing good agreement. The spray mass flux is confirmed to be the dominant factor for heat transfer in spray cooling, where single-phase convection within the thin fluid film on the flat surface is identified as the primary heat transfer mechanism. This enhancement of heat transfer, via single-phase convection, is identified to be the result of the discrete random nature of the droplets disrupting the surface of thin film.
Affiliation:
University of Sussex; University of Derby
Citation:
Langari, M. et al (2017) 'Multiphase computational fluid dynamics–conjugate heat transfer for spray cooling in the non-boiling regime', The Journal of Computational Multiphase Flows, DOI: 10.1177/1757482X17746921
Publisher:
Sage
Journal:
The Journal of Computational Multiphase Flows
Issue Date:
11-Dec-2017
URI:
http://hdl.handle.net/10545/622133
DOI:
10.1177/1757482X17746921
Additional Links:
http://journals.sagepub.com/doi/10.1177/1757482X17746921
Type:
Article
Language:
en
ISSN:
1757482X
EISSN:
17574838
Sponsors:
N/A
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorLangari, Mostafaen
dc.contributor.authorYang, Zhiyinen
dc.contributor.authorDunne, Julian F.en
dc.contributor.authorJafari, Soheilen
dc.contributor.authorPirault, Jean-Pierreen
dc.contributor.authorLong, Chris A.en
dc.contributor.authorJose, JTen
dc.date.accessioned2018-02-13T14:51:45Z-
dc.date.available2018-02-13T14:51:45Z-
dc.date.issued2017-12-11-
dc.identifier.citationLangari, M. et al (2017) 'Multiphase computational fluid dynamics–conjugate heat transfer for spray cooling in the non-boiling regime', The Journal of Computational Multiphase Flows, DOI: 10.1177/1757482X17746921en
dc.identifier.issn1757482X-
dc.identifier.doi10.1177/1757482X17746921-
dc.identifier.urihttp://hdl.handle.net/10545/622133-
dc.description.abstractA numerical study is described to predict, in the non-boiling regime, the heat transfer from a circular flat surface cooled by a full-cone spray of water at atmospheric pressure. Simulations based on coupled computational fluid dynamics and conjugate heat transfer are used to predict the detailed features of the fluid flow and heat transfer for three different spray conditions involving three mass fluxes between 3.5 and 9.43 kg/m2s corresponding to spray Reynolds numbers between 82 and 220, based on a 20 mm diameter target surface. A two-phase Lagrange–Eulerian modelling approach is adopted to resolve the spray-film flow dynamics. Simultaneous evaporation and condensation within the fluid film is modelled by solving the mass conservation equation at the film–continuum interface. Predicted heat transfer coefficients on the cooled surface are compared with published experimental data showing good agreement. The spray mass flux is confirmed to be the dominant factor for heat transfer in spray cooling, where single-phase convection within the thin fluid film on the flat surface is identified as the primary heat transfer mechanism. This enhancement of heat transfer, via single-phase convection, is identified to be the result of the discrete random nature of the droplets disrupting the surface of thin film.en
dc.description.sponsorshipN/Aen
dc.language.isoenen
dc.publisherSageen
dc.relation.urlhttp://journals.sagepub.com/doi/10.1177/1757482X17746921en
dc.rightsArchived with thanks to The Journal of Computational Multiphase Flowsen
dc.subjectComputational fluid dynamics (CFD)en
dc.subjectCondensationen
dc.subjectConjugate heat transferen
dc.subjectEvaporationen
dc.titleMultiphase computational fluid dynamics–conjugate heat transfer for spray cooling in the non-boiling regime.en
dc.typeArticleen
dc.identifier.eissn17574838-
dc.contributor.departmentUniversity of Sussexen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalThe Journal of Computational Multiphase Flowsen
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
dc.contributor.institutionDepartment of Engineering, College of Engineering and Technology, University of Derby, Derby, UK-
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
dc.contributor.institutionDepartment of Engineering and Design, School of Engineering and Informatics, University of Sussex, Falmer, UK-
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