کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7055577 1458044 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micro-PIV study of flow and the formation of vortex in micro heat sinks with cavities and ribs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Micro-PIV study of flow and the formation of vortex in micro heat sinks with cavities and ribs
چکیده انگلیسی
A hydrodynamics of deionized water flowing through the micro heat sinks with cavities and ribs are investigated experimentally. The Reynolds number ranges from 70 to 320. Using micro particle image velocimetry (Micro-PIV) and numerical simulation, velocity and vector fields are both obtained. The comparative results show that the distribution of centerline velocity changes periodically, which shows good agreement between simulations and experiments. Moreover, the vortices easily form in the cavities zones if the kinetic energy and negative pressure gradient exhaust along the flow direction. The physical mechanism of heat transfer enhancement is explained from the view point of fluid flow. The main reasons can ascribe that the heat transfer area and flow turbulence increase due to the existent of cavities and ribs under small Reynolds number; the secondary flow is helpful for mixing the cold and hot fluid in cavities zones as well as the increased turbulence in ribs zones under high Reynolds number.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 98, July 2016, Pages 380-389
نویسندگان
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