Toghraee, D., Karimipour, A., Akbari, O., Zaringhalam, M., Alipour, H. (2016). Numerical investigation of heat transfer and laminar Water-Al2O3 nanofluid flow in a rectangular Rib-Microchannel. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), 391-408.
Davood Toghraee; Arash Karimipour; OmidAli Akbari; Majid Zaringhalam; Habibolah Alipour. "Numerical investigation of heat transfer and laminar Water-Al2O3 nanofluid flow in a rectangular Rib-Microchannel". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 3, 2016, 391-408.
Toghraee, D., Karimipour, A., Akbari, O., Zaringhalam, M., Alipour, H. (2016). 'Numerical investigation of heat transfer and laminar Water-Al2O3 nanofluid flow in a rectangular Rib-Microchannel', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), pp. 391-408.
Toghraee, D., Karimipour, A., Akbari, O., Zaringhalam, M., Alipour, H. Numerical investigation of heat transfer and laminar Water-Al2O3 nanofluid flow in a rectangular Rib-Microchannel. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(3): 391-408.
Numerical investigation of heat transfer and laminar Water-Al2O3 nanofluid flow in a rectangular Rib-Microchannel
1Assistant Professor, Department of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Iran, Isfahan.
2Assistant Professor, Department of Mechanical Engineering, Islamic Azad University, Najaf Abad, Iran, Isfahan.
3Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
4MSc, Department of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Iran, Isfahan
Abstract
در تحقیق حاضر در مورد اثرات ارتفاع دندانه در میکروکانال دندانه‌دار دو بعدی، بر روی پارامترهای انتقال حرارت و دینامیک سیالات محاسباتی جریان آرام نانوسیال آب-اکسید آلومینیم است. بررسی‌های این تحقیق به صورت عددی با نرم افزار تجاری فلوئنت3/6 برای اعداد رینولدز10 و 100، برای چهار حالت مختلف ارتفاع دندانه انجام شده است. افزایش ارتفاع دندانه‌های داخلی یا مغشوشگرهای جریان، عملکرد انتقال حرارت جابجایی در میکروکانال را به میزان قابل توجهی افزایش می‌دهد. مشاهده می‌شود که نرخ انتقال حرارت در میکروکانال با افزایش ارتفاع دندانه و افزایش کسر حجمی نانو ذرات، بهبود می‌یابد. اما افزایش ارتفاع دندانه، باعث افزایش ضریب اصطکاک بزرگ‌تر در مقایسه با میکروکانال با ارتفاع دندانه ثابت است. در این تحقیق برای همه حالات مختلف ارتفاع دندانه، تأثیر ارتفاع دندانه بر روی پارامترهای جریان سیال بررسی شده است. نتایج در قالب پروفیل‌های سرعت و دما، عدد ناسلت و کانتورهای تابع جریان و خطوط هم دما ترسیم می-شوند......
بررسی عددی انتقال حرارت و جریان آرام نانوسیال آب-اکسید آلومینیم در میکروکانال مستطیلی دندانه‌دار
Authors [Persian]
داود طغرایی1; آرش کریمی پور2; امید علی اکبری3; مجید زرین قلم4; حبیب اله عالی‌پور4
1استادیار، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد خمینی شهر، ایران، اصفهان.
2استادیار، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد نجف آباد، ایران، اصفهان.
3باشگاه پژوهشگران جوان و نخبگان، واحد خمینی شهر، دانشگاه آزاد اسلامی، واحد خمینی شهر، ایران
4کارشناس ارشد، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد خمینی شهر، ایران، اصفهان
Abstract [Persian]
This paper numerically examines the laminar forced convection of a water–Al2O3 nanofluid flowing through a horizontal rib-microchannel. The middle section of the down wall microchannel is Affected by cold temperatures with a constant and uniform tempreture Tc. The middle section is also influenced by a transverse rib array. The effects of height rib in a two dimensional rib-microchannel on flow and heat transfer parameters of laminar water-Al2O3 nanofluid are investigated. The characteristics of this research are numerically investigated by the commercial software Fluent 6.3 in a Reynolds number as Re=10 and Re=100. Four different states of hight rib are analyzed. Higher conventional internal ribs or increasing the turbulators can significantly improve the performances of the convective heat transfer within a microchannel. It is seen that larger height rib and volume fraction of nanoparticles corresponds more heat transfer rate; however the added high ribs can cause a larger friction factor than that in the corresponding microchannel by constant height rib. At present article the effect of height rib on the fluid flow parameters are also studied for all different states of it. The results show that the microchannel performs better heat transfers at higher values of the Reynolds numbers. For all values of the Reynolds numbers and volume fraction of nanoparticles considered in this study, the average Nusselt number on the middle section surface of the microchannel increases as the solid volume fraction increases.
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