کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4995169 1458701 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of heat transfer and pressure drop of heat transfer oil in smooth and micro-finned tubes
ترجمه فارسی عنوان
بررسی عددی انتقال حرارت و افت فشار روغن انتقال حرارت در لوله های صاف و خرد شده
کلمات کلیدی
انتقال گرما، افت فشار، لوله میکرو ریخته گری، بررسی عددی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The laminar, non-isothermal flow of the heat transfer oil in horizontal smooth and micro-finned tubes with different fin heights and helical angles are investigated numerically for the constant wall temperature boundary condition. Simulations have been performed for the Reynolds number ranging from 100 to 1000, the fin height varying from 0.2 to 0.5 mm, and the fin helix angle between 5 and 45°. The results are presented in the form of streamlines, temperature contours, relative Nusselt number, and friction factor. The numerical procedure is validated by comparing the simulation results for the flow and heat transfer of the oil through the micro-finned and smooth tubes with the corresponding experimental results from the literature. The comparisons demonstrate good agreements between the simulation and the experimental results for both the smooth and micro-finned tubes. The results indicate maximum heat transfer enhancement of 44 percent and friction factor increase of 69 percent for the flow of heat transfer oil through the micro-finned tubes in comparison with heat transfer and friction factor of the fluid flow through the corresponding smooth tube at the Reynolds number of 103.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 121, November 2017, Pages 294-304
نویسندگان
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