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

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    Type
    Article
    Authors
    El-Amin, Mohamed cc
    Al-Ghamdi, Abdulmajeed
    Salama, Amgad cc
    Sun, Shuyu cc
    KAUST Department
    Computational Transport Phenomena Lab
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2016-01-23
    Online Publication Date
    2016-01-23
    Print Publication Date
    2015-12
    Permanent link to this record
    http://hdl.handle.net/10754/596011
    
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    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.
    Citation
    Numerical simulation and analysis of confined turbulent buoyant jet with variable source 2015, 27 (6):955 Journal of Hydrodynamics, Ser. B
    Publisher
    Springer Nature
    Journal
    Journal of Hydrodynamics
    DOI
    10.1016/S1001-6058(15)60558-3
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S1001605815605583
    ae974a485f413a2113503eed53cd6c53
    10.1016/S1001-6058(15)60558-3
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program; Computational Transport Phenomena Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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