کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4911536 | 1428377 | 2017 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study and numerical models assessment of turbulent mixed convection heat transfer in a vertical open cavity
ترجمه فارسی عنوان
بررسی تجربی و مدل های عددی بررسی انتقال حرارت متساوی مخلوط آشفته در یک حفره عمودی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Flow and heat transfer in a vertical open cavity with turbulent mixed convection is investigated experimentally and numerically. The internal size of the cavity is 1 m Ã 1 m Ã 1.2 m, with liquid nitrogen as the cold source and mica electronic heating plates as the heat source of the experiments. The velocity and temperature fields are obtained by hot-wire anemometry, particle image velocimetry and local temperature sensors for 4.6 Ã 104 â¤Â Re â¤Â 5.9 Ã 104 and Gr â¤Â 1.8 Ã 1013. The secondary upward flow was found to occur near the heated walls. Three two-equation RANS turbulence models, RNG k-ε model, L-B Low Re k-ε model and SST k-Ï model, are used in the numerical simulation with the same boundary conditions as experiments. Through comparison with experimental data, Low Re k-ε model performs overall the best in the accuracy in solving mixed convection problems in large-scale vertical cavities with strong buoyancy force.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 115, April 2017, Pages 91-103
Journal: Building and Environment - Volume 115, April 2017, Pages 91-103
نویسندگان
Guang Yang, Yiye Huang, Jingyi Wu, Liangjun Zhang, Guozhen Chen, Rongrong Lv, Aifeng Cai,