بهبود عملکرد خنک‌کاری یک میکروکانال حاوی نانوسیال با استفاده از پره‌های منقطع

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان، ایران

چکیده

در این پژوهش، شبیه‌سازی عددی جریان نانوسیال هیبریدی در پنج هندسه چاه حرارتی میکروکانالی با پره‌های منقطع انجام شده و نتایج با هندسه ساده مقایسه شده است. شبیه‌سازی‌ها با روش حجم محدود و الگوریتم سیمپل در نرم‌افزار انسیس فلوئنت برای جریان آرام، دائم و تراکم‌ناپذیر در اعداد رینولدز 100 تا 600 و کسر حجمی 0، 0.01 و 0.02 نانوذرات انجام شده است و افت فشار، عدد ناسلت متوسط، معیار ارزیابی عملکرد، مقاومت حرارتی و دمای دیواره پایینی برای حالت‌های مختلف محاسبه و تحلیل شده‌اند. بیشترین افت فشار در هندسه با پره‌های منقطع مثلثی و در عدد رینولدز 600 برای سیال پایه رخ داده که نسبت به هندسه پایه 9.3 برابر بیشتر شده است و بیشترین بهبود عدد ناسلت حدود 49.4 درصد در همین هندسه ثبت گردیده است. ترتیب هندسه‌ها از نظر مقاومت حرارتی به صورت هندسه پایه، پره مربعی، پره شش‌ضلعی، پره دایروی، پره لوزوی و پره مثلثی است و نشان‌دهنده نقش پره‌ها در کاهش مقاومت حرارتی است. پس از شناسایی هندسه بهینه، تأثیر چیدمان و ارتفاع پره‌ها بررسی شده و بهترین عملکرد برای پره مثلثی با ارتفاع 0.06 میلی‌متر، 0.02 درصد نانوذرات و عدد رینولدز 600 با معیار ارزیابی عملکرد حدود 1.8 به دست آمده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Improving the Cooling Performance of a Microchannel Containing Nanofluid Using Interrupted Fins

نویسندگان [English]

  • Elahe Ghanaati
  • Ghanbar Ali Sheikhzadeh
Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran
چکیده [English]

A numerical simulation of hybrid nanofluid flow in five microchannel heat sink geometries with interrupted fins was carried out, and the results were compared with a simple geometry. The simulations were performed using the finite volume method and the SIMPLE algorithm in ANSYS Fluent for laminar, steady, and incompressible flow at Reynolds numbers ranging from 100 to 600 and nanoparticle volume fractions of 0, 0.01, and 0.02. Various parameters were calculated and analyzed for different cases. The highest pressure drop occurred in the geometry with triangular interrupted fins at a Re=600 for the base fluid, which was 9.3 times higher than that of the simple geometry. The maximum enhancement in the Nusselt number, about 49.4%, was also observed in this geometry. The order of geometries in terms of thermal resistance was as follows: simple geometry, square fins, hexagonal fins, circular fins, rhombic fins, and triangular fins, indicating the role of fins in reducing thermal resistance. After identifying the optimal geometry, the effects of fin arrangement and height were investigated, and the best performance was obtained for triangular fins with a height of 0.06 mm, a nanoparticle volume fraction of 0.02, and a Reynolds number of 600, achieving a performance evaluation criterion of approximately 1.8. These results confirm the importance of geometric design and optimal fin height selection in enhancing the thermo-hydrodynamic performance of microchannels.

کلیدواژه‌ها [English]

  • Hybrid Nanofluid
  • Microchannel Heat Sink
  • Interrupted Fins
  • Numerical Simulation
  • Performance Evaluation Criterion

مراجع

[1] D.B. Tuckerman, R.F.W. Pease, High‑Performance Heat Sinking for VLSI, IEEE Electron Device Letters, 2(5) (1981) 126-129.
[2] H.A. Amiri, F. Afsharpanah, S. Moshafi, S. Asiaei, Thermal management of an asymmetrical wavy microchannel heat sink via Ag/water nanofluid, Case Studies in Thermal Engineering, 53 (2024) 103857.
[3] J. Yuan, N. Deng, Y. Qu, L. Du, W. Hu, Z. Zhang, H. Wang, A novel center-hybrid pin-fin microchannel heat sink with embedded secondary microchannels for hotspot thermal management, International Journal of Thermal Sciences, 207 (2025) 109381.
[4] S. Rastogi, N. Mondal, C. Bakli, Systematic design of tree-like branching network microchannel heat sinks for enhanced heat transfer with nanofluids, Applied Thermal Engineering, 257 (2024) 124272.
[5] Z. Sun, T. Wang, B. Qian, Y. Wang, J. Wang, C. Hong, Study on the efficient heat transfer mechanism of microchannel pin-fin arrays under low pumping power, Applied Thermal Engineering, 241 (2024) 122386.
[6] S. Sarvar, P. Kabirzadeh, N. Miljkovic, Combining pin-fins and superhydrophobic surfaces to enhance the performance of microchannel heat sinks, International Communications in Heat and Mass Transfer, 160 (2025) 108351.
[7] Y. Alihosseini, Y. Oghabneshin, A.R. Bari, S. Moslemi, A.R. Roozbehi, M.Z. Targhi, W. Guo, Performance of high-concentration photovoltaic cells cooled by a hybrid microchannel heat sink, Applied Thermal Engineering, 238 (2024) 122206.
[8] P. Kumar, M.N. Guruprasad, F. Almeida, Thermal analysis of magnetized ZnO-blood nanofluid anticipating couple stresses in vertical microchannel using differential transform method, Journal of Molecular Liquids, 424 (2025) 127051.
[9] M.A. Soltanie, J. Rostami, A. Qaderi, Numerical analysis of convective heat transfer in mini electronic components using tube heatsinks equipped by porous ribs, solid ribs and nanofluid, Chemical Engineering Science, 319 (2026) 122149.
[10] M. Bargal, R. Ben-Bansour, H. Mohamed, A. Zaki, H. Muhammad Ali, L. Alhems, Thermohydraulic investigation of graphene quantum dots nanofluids in a novel microchannel heat sink with a combination of elliptical ribs, secondary channels, and sinusoidal cavity, Journal of Thermal Analysis and Calorimetry, 150 (2025).
[11] M. Setareh, I. Sheydayi, M. Assari, H. Basirat Tabrizi, A Numerical Study on the Novel Composition of Porous and Solid Ribs to Augment the Thermal Performance of a Hybrid Nanofluid-Based Microchannel Heat Sink with External Fins, Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 49 (2024) 1-29.
[12] V. Sharma, K.B. Rana, R. Patidar, B.L. Gupta, A heat transfer analysis of thermal performance for rectangular microchannel with ribs and graphene oxide/oil based nanofluid, Progress in Engineering Science, 2(3) (2025) 100129.
[13] H. Ghasemi, G.A. Sheikhzadeh, A. Fattahi, Numerical Simulation and ANN Prediction of Nano-Encapsulated PCM Slurry in a Microchannel: A Thermodynamic Analysis, Arabian Journal for Science and Engineering, (2025).
[14] R. Rezazadeh, J. Rostami, A. Qaderi, Numerical investigation of Conjugate heat transfer in micro-electronic devices using wavy microchannels with nanofluid in the presence of porous ribs, Energy, 338 (2025) 138918.
[15] F. Rezvannezhad, J. Rostami, Heat Transfer of Nanofluids in Converging and Diverging Mi crochannels by Mixture Model, Amirkabir J. Mech Eng., 55(5) (2023) 595-616. (In Persian).
[16] M. Hashemabadia, R. Hajianb, J. Pirkandia, Sh. Mansorib, S. A. Sadrvaghefic, Experimental investigation and performance comparison of two types of microchannel and Fin-tube con densers with R407c refrigerant in compression refrigeration cycle, Amirkabir J. Mech Eng., 55(5) (2023) 577-594. (In Persian).
[17] H. Roueintan, A. Fattahi, On the pillow-plate heat exchanger with wavy walls and filled with a hybrid nanofluid: Numerical simulation and data-assisted prediction, Case Studies in Thermal Engineering, 64 (2024) 105495.
[18] J. Duffie, W. Beckman, Solar Engineering of Thermal Processes, 2006.
[19] A. Kashani, R.H. Rasheed, M.A. Hussein, O.A. Akbari, H.K. Abdul-Redha, G. Ahmadi, S. Salahshour, R. Sabetvand, Simulation of flow dynamics and heat transfer behavior of nanofluid in microchannel with rough surfaces, International Journal of Thermofluids, 24 (2024) 100901.
[20] S. Kandlikar, Heat Transfer Mechanisms During Flow Boiling in Microchannels, Journal of Heat Transfer, 126 (2003).
نشریه مهندسی مکانیک امیرکبیر
دوره 57، شماره 7
مهر 1404
صفحه 817-844

فایل ها

هم رسانی

ارجاع به این مقاله

آمار