The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s
محورهای موضوعی : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
موسی حیدری
1
(
کارشناس ارشد، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد خمینی شهر، ایران، اصفهان.
)
داود طغرایی
2
(
استادیار، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد خمینی شهر، ایران، اصفهان.
)
امید علی اکبری
3
(
باشگاه پژوهشگران جوان و نخبگان، واحد خمینی شهر، دانشگاه آزاد اسلامی، واحد خمینی شهر، ایران
)
کلید واژه: نانوذره, عدد ناسلت, دینامیک سیالات محاسباتی, میکروکانال, دندانه‌های نیمه -چسبان- نیمه ناقص,
چکیده مقاله :
In this numerical study the the heat transfer and laminar nanofluid flow in the three-dimensional microchannels with triangular cross-section is simulated. For increase the heat transfer from the walls of the channel, semiattached & offset mid- truncated rib,s Placed in the canal, and the tooth geometry and the impact is studied. In this study, the water is base fluid, and the influence of the volume fraction of nanoparticles of titanium oxide on the the heat transfer and the fluid flow physics is studied. The presented results include the distribution of Nusselt number in the channel, The coefficient of friction and the thermal-fluid performance for each of the different states. The results show the existence of is the tooth on the effective flow physics. And their efficacy is highly dependent on Reynolds number. Use indentation in the microchannels, increase the heat transfer rate and the reduce the temperature gradient between the layers of the cooling fluid. Also, the presence of nanoparticles in the fluid cooling is effective and the pain increase the heat transfer by increasing the Reynolds number, the effect of nanoparticles also increase the heat transfer increases.
در پژوهش عددی حاضر انتقال حرارت و جریان آرام نانوسیال در داخل یک میکروکانال سه بعدی با مقطع مثلثی شبیه سازی شده است. به منظور افزایش انتقال حرارت از دیواره-های کانال، دندانه‌های نیمه چسبان- نیمه ناقص در داخل کانال قرار داده شده و تاثیر هندسه دندانه‌ها و تعداد آن‌ها مورد مطالعه قرار گرفته است.در مطالعه‌ی حاضر، سیال پایه آب بوده و تاثیر کسر حجمی نانوذره اکسید تیتانیوم بر میزان انتقال حرارت و فیزیک جریان مورد بررسی قرار گرفته است. نتایج ارائه شده شامل توزیع عدد ناسلت در کانال، ضریب اصطکاک و ضریب عملکرد حرارتی برای هر یک از حالت‌های مختلف می‌باشد. نتایج به دست آمده نشان می‌دهد، وجود دندانه‌ها بر فیزیک جریان تاثیرگذار هستند و میزان تاثیر آن‌ها شدیداً به عدد رینولدز جریان وابسته است. اﺳﺘﻔﺎده از دﻧﺪاﻧﻪ در ﻣﯿﮑﺮوﮐﺎﻧﺎلﻫﺎ ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﻧﺮخ اﻧﺘﻘﺎل ﺣﺮارت و ﮐﺎﻫﺶ ﮔﺮادﯾﺎن دﻣﺎﯾﯽ در ﺑﯿﻦ ﻻﯾﻪﻫﺎی ﺳﯿﺎل ﺧﻨﮏ ﮐﻨﻨﺪه ﻣﯽﺷﻮد و هم‌چنین وﺟﻮد ﻧﺎﻧﻮذرات در ﺳﯿﺎل ﺧﻨﮏ ﮐﻨﻨﺪه ﻧﯿﺰ در اﻓﺰاﯾﺶ اﻧﺘﻘﺎل ﺣﺮارت موثر است، به طوری‌که ﺑﺎ اﻓﺰاﯾﺶ ﻋﺪد رﯾﻨﻮﻟﺪز، میزان اثرگذاری نانوذره نیز در اﻓﺰاﯾﺶ انتقال حرارت، افزایش می‌یابد.
[1] Bergles, A.E., Some perspectives on enhanced heat transfer, second-generation heat transfer technology, J. Heat Transf. 110 (2000) 1082.
[2] Siddique M., Khaled, A.R.A., Abdulhafiz, N. I., Boukhary A. Y., “Recent advances in heat transfer enhancements”: A review report, International Journal of Chemical Engineering, Vol. 2010, pp. 1-28.
[3] Bergles, A. E., The implication and challenges of enhanced heat transfer for the chemical process industries, ICHemE, Vol. 79, 2001, pp. 437 -444.
[4] Sakanova, A., Chan Chun Keian, Jiyun Zhao Performance improvements of microchannel heat sink using wavy channel and nanofluids, International Journal of Heat and Mass Transfer, Vol. 89, 2015, pp. 59 –74.
[5] Rimbault, B., N, C.T., Galanis, N, Experimental investigation of CuO–water nanofluid flow and heat transfer inside a microchannel heat sink, International Journal of Thermal Sciences, Vol. 84, 2014, pp. 275 –292.
[6] Li, P., D. Zhang, Yonghui Xie. Heat transfer and flow analysis of Al2O3–water nanofluids in microchannel with dimple and protrusion, International Journal of Heat and Mass Transfer, Vol. 73, 2014, pp. 456 – 467.
[7] Huichun Liu, H., Wang J., “Numerical investigation on synthetical performances of fluid flow and heattransfer of semiattached rib-channels”, Int. J. Heat Mass Transfer, Vol. 55, 2012, pp. 234-243.
[8] Hatami M., Ganji, D. D., Thermal and flow analysis of microchannel heat sink (MCHS) cooled by Cu–water nanofluid using porous media approach and least square method, Energy Convers. Manag, Vol. 78, 2014, pp. 347 – 358.
[9] Sheikhzadeh, G. A., Ebrahim Qomi, M., Hajialigol N., Fattahi A., “Effect of Al2O3-water nanofluid on heat transfer and pressure drop in a three-dimensional microchannel”, Int. J.Nano Dimens, Vol. 3, 2013, pp. 281–288.
[10] Abu-Nada, E., Masoud, Z., Hijazi, A., Natural Convection Heat Transfer Enhance-ment in Horizontal Concentric Annuli using Nanofluids, Int. Comm. in Heat and Mass Transfer , Vol. 35, 2008, pp. 657– 665
[11] Brinkman, H.C. The Viscosity of Concentrated Suspensions and Solution, J. Chem. Phys. , vol. 20, pp. 571–581, 1952.
[12] Aminossadati S. M., Ghasemi B., “Natural Convection Cooling of a Localised Heat Source at the Bottom of a Nanofluid-Filled Enclosure, European Journal of Mechanics B/Fluids, No. 28,2009, pp. 630-640.
[13] Patel, H. E., Sundararajan, T., Pradeep, T., Dasgupta, A., Dasgupta, N., and Das, S.K.A Micro-Convection Model for Thermal Conductivity of Nanofluids, Pramana — J. Phys, vol. 65, no. 5, pp. 863–869, 2005.
[14] Liu, H., Wang, J., Numerical investigation on synthetical performances of fluid flow and heat transfer of semiattached rib-channels, International Journal of Heat and Mass Transfer, Vol. 54, 2011, pp. 575 –583
[15] Mital, M., Analytical analysis of heat transfer and pumping power of laminar nanofluid developing flow in microchannels, Applied Thermal Engineering, Vol. 50, 2013, pp. 429 – 436.
[16] Lewis, F. M., Princeton, N. J., Friction factors for pipe flow, Transaction of the A.S.M.E. Vol. 1, 1944, pp. 671- 684
[17] Papautsky, I., Gale, B. K., Mohanty, S., Ameel, T. A., Frazier, A. B., Effects of rectangular microchannel aspect ratio on laminar friction constant, Proc. SPIE, Microfluidic Devices and Systems,Vol. 11, 1999, pp. 147-158.
[18] Aminossadati, S. M., Raisi, A., Ghasemi, B., “Effects of magnetic field on nanofluid forced convection in a partially heated microchannel”, International Journal of Non-Linear Mechanics, Vol. 46, 2011, pp. 1373–1382
[1] Bergles, A.E., Some perspectives on enhanced heat transfer, second-generation heat transfer technology, J. Heat Transf. 110 (2000) 1082.
[2] Siddique M., Khaled, A.R.A., Abdulhafiz, N. I., Boukhary A. Y., “Recent advances in heat transfer enhancements”: A review report, International Journal of Chemical Engineering, Vol. 2010, pp. 1-28.
[3] Bergles, A. E., The implication and challenges of enhanced heat transfer for the chemical process industries, ICHemE, Vol. 79, 2001, pp. 437 -444.
[4] Sakanova, A., Chan Chun Keian, Jiyun Zhao Performance improvements of microchannel heat sink using wavy channel and nanofluids, International Journal of Heat and Mass Transfer, Vol. 89, 2015, pp. 59 –74.
[5] Rimbault, B., N, C.T., Galanis, N, Experimental investigation of CuO–water nanofluid flow and heat transfer inside a microchannel heat sink, International Journal of Thermal Sciences, Vol. 84, 2014, pp. 275 –292.
[6] Li, P., D. Zhang, Yonghui Xie. Heat transfer and flow analysis of Al2O3–water nanofluids in microchannel with dimple and protrusion, International Journal of Heat and Mass Transfer, Vol. 73, 2014, pp. 456 – 467.
[7] Huichun Liu, H., Wang J., “Numerical investigation on synthetical performances of fluid flow and heattransfer of semiattached rib-channels”, Int. J. Heat Mass Transfer, Vol. 55, 2012, pp. 234-243.
[8] Hatami M., Ganji, D. D., Thermal and flow analysis of microchannel heat sink (MCHS) cooled by Cu–water nanofluid using porous media approach and least square method, Energy Convers. Manag, Vol. 78, 2014, pp. 347 – 358.
[9] Sheikhzadeh, G. A., Ebrahim Qomi, M., Hajialigol N., Fattahi A., “Effect of Al2O3-water nanofluid on heat transfer and pressure drop in a three-dimensional microchannel”, Int. J.Nano Dimens, Vol. 3, 2013, pp. 281–288.
[10] Abu-Nada, E., Masoud, Z., Hijazi, A., Natural Convection Heat Transfer Enhance-ment in Horizontal Concentric Annuli using Nanofluids, Int. Comm. in Heat and Mass Transfer , Vol. 35, 2008, pp. 657– 665
[11] Brinkman, H.C. The Viscosity of Concentrated Suspensions and Solution, J. Chem. Phys. , vol. 20, pp. 571–581, 1952.
[12] Aminossadati S. M., Ghasemi B., “Natural Convection Cooling of a Localised Heat Source at the Bottom of a Nanofluid-Filled Enclosure, European Journal of Mechanics B/Fluids, No. 28,2009, pp. 630-640.
[13] Patel, H. E., Sundararajan, T., Pradeep, T., Dasgupta, A., Dasgupta, N., and Das, S.K.A Micro-Convection Model for Thermal Conductivity of Nanofluids, Pramana — J. Phys, vol. 65, no. 5, pp. 863–869, 2005.
[14] Liu, H., Wang, J., Numerical investigation on synthetical performances of fluid flow and heat transfer of semiattached rib-channels, International Journal of Heat and Mass Transfer, Vol. 54, 2011, pp. 575 –583
[15] Mital, M., Analytical analysis of heat transfer and pumping power of laminar nanofluid developing flow in microchannels, Applied Thermal Engineering, Vol. 50, 2013, pp. 429 – 436.
[16] Lewis, F. M., Princeton, N. J., Friction factors for pipe flow, Transaction of the A.S.M.E. Vol. 1, 1944, pp. 671- 684
[17] Papautsky, I., Gale, B. K., Mohanty, S., Ameel, T. A., Frazier, A. B., Effects of rectangular microchannel aspect ratio on laminar friction constant, Proc. SPIE, Microfluidic Devices and Systems,Vol. 11, 1999, pp. 147-158.
[18] Aminossadati, S. M., Raisi, A., Ghasemi, B., “Effects of magnetic field on nanofluid forced convection in a partially heated microchannel”, International Journal of Non-Linear Mechanics, Vol. 46, 2011, pp. 1373–1382
