Numerical simulation and analysis of confined turbulent buoyant jet with variable source

Handle URI:
http://hdl.handle.net/10754/596011
Title:
Numerical simulation and analysis of confined turbulent buoyant jet with variable source
Authors:
El-Amin, Mohamed ( 0000-0002-1099-2299 ) ; Al-Ghamdi, Abdulmajeed; Salama, Amgad ( 0000-0002-4463-1010 ) ; Sun, Shuyu ( 0000-0002-3078-864X )
Abstract:
In this work, experimental and numerical investigations are undertaken for confined buoyant turbulent jet with varying inlet temperatures. Results of the experimental work and numerical simulations for the problem under consideration are presented. Four cases of different variable inlet temperatures and different flow rates are considered. The realizable k-ɛ turbulence model is used to model the turbulent flow. Comparisons show good agreements between simulated and measured results. The average deviation of the simulated temperature by realizable k-ɛ turbulent model and the measured temperature is within 2%. The results indicate that temperatures along the vertical axis vary, generally, in nonlinear fashion as opposed to the approximately linear variation that was observed for the constant inlet temperature that was done in a previous work. Furthermore, thermal stratification exits, particularly closer to the entrance region. Further away from the entrance region the variation in temperatures becomes relatively smaller. The stratification is observed since the start of the experiment and continues during the whole course. Numerical experiments for constant, monotone increasing and monotone decreasing of inlet temperature are done to show its effect on the buoyancy force in terms of Richardson number.
KAUST Department:
Computational Transport Phenomena Lab; Physical Sciences and Engineering (PSE) Division
Citation:
Numerical simulation and analysis of confined turbulent buoyant jet with variable source 2015, 27 (6):955 Journal of Hydrodynamics, Ser. B
Publisher:
Elsevier BV
Journal:
Journal of Hydrodynamics, Ser. B
Issue Date:
23-Jan-2016
DOI:
10.1016/S1001-6058(15)60558-3
Type:
Article
ISSN:
10016058
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1001605815605583
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computational Transport Phenomena Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorEl-Amin, Mohameden
dc.contributor.authorAl-Ghamdi, Abdulmajeeden
dc.contributor.authorSalama, Amgaden
dc.contributor.authorSun, Shuyuen
dc.date.accessioned2016-02-10T12:54:26Zen
dc.date.available2016-02-10T12:54:26Zen
dc.date.issued2016-01-23en
dc.identifier.citationNumerical simulation and analysis of confined turbulent buoyant jet with variable source 2015, 27 (6):955 Journal of Hydrodynamics, Ser. Ben
dc.identifier.issn10016058en
dc.identifier.doi10.1016/S1001-6058(15)60558-3en
dc.identifier.urihttp://hdl.handle.net/10754/596011en
dc.description.abstractIn this work, experimental and numerical investigations are undertaken for confined buoyant turbulent jet with varying inlet temperatures. Results of the experimental work and numerical simulations for the problem under consideration are presented. Four cases of different variable inlet temperatures and different flow rates are considered. The realizable k-ɛ turbulence model is used to model the turbulent flow. Comparisons show good agreements between simulated and measured results. The average deviation of the simulated temperature by realizable k-ɛ turbulent model and the measured temperature is within 2%. The results indicate that temperatures along the vertical axis vary, generally, in nonlinear fashion as opposed to the approximately linear variation that was observed for the constant inlet temperature that was done in a previous work. Furthermore, thermal stratification exits, particularly closer to the entrance region. Further away from the entrance region the variation in temperatures becomes relatively smaller. The stratification is observed since the start of the experiment and continues during the whole course. Numerical experiments for constant, monotone increasing and monotone decreasing of inlet temperature are done to show its effect on the buoyancy force in terms of Richardson number.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1001605815605583en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Hydrodynamics, Ser. B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Hydrodynamics, Ser. B, 23 January 2016. DOI: 10.1016/S1001-6058(15)60558-3.en
dc.subjectrealizable k-ɛ modelen
dc.subjectturbulent jeten
dc.subjectstratificationen
dc.subjectheat storesen
dc.subjectCFDen
dc.titleNumerical simulation and analysis of confined turbulent buoyant jet with variable sourceen
dc.typeArticleen
dc.contributor.departmentComputational Transport Phenomena Laben
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Hydrodynamics, Ser. Ben
dc.eprint.versionPost-printen
dc.contributor.institutionMathematics Department, Faculty of Science, Aswan University, Aswan 81528, Egypten
dc.contributor.institutionCollege of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah, Kingdom of Saudi Arabiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorEl-Amin, Mohameden
kaust.authorSalama, Amgaden
kaust.authorSun, Shuyuen
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