Numerical investigation of heat transfer and laminar Water-Al2O3 ‎nanofluid flow in a rectangular Rib-Microchannel

Authors

  • Arash Karimipour Assistant Professor, Department of Mechanical Engineering, Islamic Azad University, Najaf Abad, Iran, Isfahan.
  • Davood Toghraee Assistant Professor, Department of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Iran, Isfahan.
  • Habibolah Alipour MSc, Department of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Iran, Isfahan
  • Majid Zaringhalam MSc, Department of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Iran, Isfahan
  • OmidAli Akbari Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
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......

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Journal title

volume 9  issue 3

pages  391- 408

publication date 2016-10-22

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