کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657069 1458054 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical and experimental investigation of heat transfer and fluid flow characteristics in a micro-scale serpentine channel
ترجمه فارسی عنوان
بررسی عددی و آزمایشی انتقال حرارت و ویژگی های جریان سیال در کانال سرپانتین میکروسکوپ
کلمات کلیدی
جریان آرام، میکرو کانال مارپیچ، افزایش انتقال گرما همراه است کاهش افت فشار، جریان ثانویه، گردابهای دین،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A combined experimental and numerical investigation is carried out to study the characteristics of laminar flow and forced convection heat transfer in a square cross-section wavy “serpentine” microchannel with the upper wall insulated and other side walls held at constant temperature. Experimental measurements of convective heat transfer and pressure drop are performed for 30/70% and 10/90% by weight mixtures of glycerine/water over a range of Dean number from 0.6 to 80. Complementary three-dimensional computational fluid dynamics numerical simulations are also conducted for the same conditions. The results show that the growth of secondary-flow vortices promotes fluid mixing in the serpentine microchannel and leads to an enhancement of the convective heat transfer. As a consequence the serpentine microchannel is able to enhance the performance of heat transfer relative to a straight microchannel over the entire range of Dean number. Meanwhile, at these values of Prandtl number the relative pressure-drop losses increase with increasing Dean number. These increased pressure-drop losses are rather modest over the whole range of Dean number compared with the significant enhancement in heat transfer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 88, September 2015, Pages 790-802
نویسندگان
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