Numerical simulation and analysis of confined turbulent buoyant jet with variable source
Type
ArticleKAUST Department
Computational Transport Phenomena LabComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Earth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2016-01-23Online Publication Date
2016-01-23Print Publication Date
2015-12Permanent link to this record
http://hdl.handle.net/10754/596011
Metadata
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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. BPublisher
Springer NatureJournal
Journal of HydrodynamicsAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S1001605815605583ae974a485f413a2113503eed53cd6c53
10.1016/S1001-6058(15)60558-3