کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4995289 | 1458704 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat transfer enhancement in microchannel heat sink by wavy channel with changing wavelength/amplitude
ترجمه فارسی عنوان
افزایش انتقال حرارت در گرمای میکرو کانال توسط کانال موجی با تغییر طول موج / دامنه
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An improved design of wavy microchannel heat sink with changing wavelength or/and amplitude along the flow direction is proposed. The thermal resistance R and the maximum bottom wall temperature difference ÎTb,max for the new design are compared with those for the straight and the original wavy design under a constant pumping power. The results show that the new design performance is enhanced significantly with lower R and smaller ÎTb,max when the wavelength of wavy units decreases or the amplitude increases. The enhancement becomes more remarkably when the absolute value of the wavelength difference Îλ or amplitude difference ÎA between two adjacent wavy units increases. The performance can be further improved by simultaneously increasing the absolute values of Îλ and ÎA. Moreover, as compared with the straight and the original wavy microchannel heat sink, the reductions in R and ÎTb,max for the new design is found more significant for the heat sink with a smaller channel aspect ratio. The heat transfer enhancement is attributed to the formation of vortices in the channel cross sections caused by the curved walls, which promotes the coolant mixing and enhances the convective heat transfer between coolant and channel walls.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 118, August 2017, Pages 423-434
Journal: International Journal of Thermal Sciences - Volume 118, August 2017, Pages 423-434
نویسندگان
Lin Lin, Jun Zhao, Gui Lu, Xiao-Dong Wang, Wei-Mon Yan,