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

查看全文 作　　者：EL-AMIN Mohamed [1,2]F.;AL-GHAMDI [3]Abdulmajeed;SALAMA [2]Amgad;SUN [2]Shuyu

机构地区：[1]Mathematics Department,Faculty of Science,Aswan University;[2]Computational Transport Phenomena Laboratory(CTPL),Division of Physical Sciences and Engineering(PSE),King Abdullah University of Science and Technology(KAUST);[3]College of Engineering and Islamic Architecture,Umm Al-Qura University

出　　处：《Journal of Hydrodynamics》索引2015年第27卷第6期,共14页

基　　金：the Institute of Scientific Research and Revival of Islamic Heritage, Umm Al-Qura University, for the support of the project (Grant No.43308012) 摘　　要：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-ε 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-ε 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. 关键词：数值模拟浮力射流湍流流动 k-ε湍流模型入口温度实验工作测量温度温度变化

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

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