انتقال حرارت جابجایی آب / در یک ریزکانال مربعی تحت شار حرارتی و میدان مغناطیسی یکنواخت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه حرارت و سیالات، دانشکده مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران

2 استاد دانشکده مهندسی مکانیک دانشگاه صنعتی شاهرود، شاهرود، ایران

3 دانشیار،گروه حرارت و سیالات، دانشکده مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران

چکیده

در این مقاله به بررسی انتقال حرارت جابجایی نانوسیال آب/ Fe3O4 در کانال با سطح مقطع مربعی با ابعاد cm1cm1cm80 تحت تأثیر شار حرارتی یکنواخت در جریان آرام فروسیال در حضور میدان مغناطیسی پرداخته می‌شود. ابتدا به تولید فروسیال با درصدهای حجمی %0/5 و %1 ، بررسی کیفیت فروسیال و روش تولیدی پرداخته می‌شود. نتایج آزمون‌های پتانسیل زتا و اشباع مغناطیسی فروسیال نشان از کیفیت و پایداری فروسیال تولیدی دارد. خواص ترمو فیزیکی فروسیال ساخته شده با روابط تجربی موجود مقایسه و ارزیابی می‌شوند. انتقال حرارت جابجایی فروسیال تولیدی تحت تأثیر شارهای حرارتی کل 546 134 وات، بدون حضور میدان مغناطیسی خارجی بررسی و سپس تأثیر میدان مغناطیسی خارجی بر انتقال حرارت فروسیال با درصد حجمی%0/5، تحت تأثیر شار حرارتی کل 1258/2 وات مطالعه می‌شود. میزان افزایش ضریب انتقال حرارت جابجایی نسبت به آب خالص، بدون وجود میدان خارجی، برای فروسیال با درصد حجمی %1، تحت شار حرارتی کل 134 وات، معادل %30، تحت شار حرارتی کل 545 وات، معادل %48 و تحت شار حرارتی کل 321/3 وات، معادل %38  می‌باشند. در شار حرارتی 1258/2 وات و برای فروسیال با غلظت %0/5، ضریب انتقال حرارت جابجایی در حضور میدان مغناطیسی خارجی نسبت به حالت عدم وجود میدان %3/16 رشد دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Convection Heat transfer Fe3O4/Water in a Square microchannel Under Uniform Heat Flux and Magnetic Field

نویسندگان [English]

  • Behnam Nilforooshan Dardashti 1
  • Mohammad Mohsen Shahmardan 2
  • Mohsen Nazari 3
1 Faculty of mechanical engineering, Shahrood university of technology, Shahrood, Iran
2 Professor, Faculty of mechanical Engineering, Shahrood University of Technology, Shahrood, Iran
3 Faculty of mechanical engineering, Shahrood university of technology, Shahrood, Iran
چکیده [English]

This study aimed to investigate the heat transfer of water/Fe3O4 nanofluid in a square cross-sectional channel with dimensions of 80 cm ⨯1 cm ⨯1 cm under the influence of a uniform heat flux perpendicular to the laminar flow of ferrofluid in the presence of a magnetic field. Firstly, the production of ferrofluid with concentrations of 0.5 vol.% and 1vol.%, their quality, and the quality of the production method was investigated. The results of zeta potential and vibrating-sample magnetometer tests show the good quality and stability of the produced ferrofluid. The thermophysical properties of the made ferrofluid are compared and evaluated with existing experimental correlations. The heat transfer of the produced ferrofluids under the influence of heat fluxes of 134-546 Watts is investigated in the absence of an external magnetic field. Then, the effect of the external magnetic field on the heat transfer at 0.5 vol.%, under the influence of a total heat flux of 1258.2 Watts is investigated. The magnitude of increase of heat transfer coefficient compared to pure water, without external field, for ferrofluid with 1 vol.%, under total heat fluxes of 134, 545, and 321.3 Watts, are 30%, 48%, and 38% respectively. At a heat flux of 1258.2 Watts, the heat transfer coefficient in the presence of an external magnetic field increases by 3.16% at 0.5 vol.% compared to the absence of a magnetic field.

کلیدواژه‌ها [English]

  • Magnetic field
  • Laminar flow
  • Heat transfer
  • Nusselt number
  • Ferrofluid
[1] A. Ghadimi, R. Saidur, H. Metselaar, A review of nanofluid stability properties and characterization in stationary conditions, International journal of heat and mass transfer, 54(17-18) (2011) 4051-4068.
[2] Z. Haddad, C. Abid, H.F. Oztop, A. Mataoui, A review on how the researchers prepare their nanofluids, International Journal of Thermal Sciences, 76 (2014) 168-189.
[3] Y. Li, S. Tung, E. Schneider, S. Xi, A review on development of nanofluid preparation and characterization, Powder technology, 196(2) (2009) 89-101.
[4] W. Yu, H. Xie, A review on nanofluids: preparation, stability mechanisms, and applications, Journal of nanomaterials, 2012 (2012).
[5] S. Özerinç, S. Kakaç, A.G. Yazıcıoğlu, Enhanced thermal conductivity of nanofluids: a state-of-the-art review, Microfluidics and Nanofluidics, 8(2) (2010) 145-170.
[6] S. Murshed, K. Leong, C. Yang, Thermophysical and electrokinetic properties of nanofluids–a critical review, Applied Thermal Engineering, 28(17-18) (2008) 2109-2125.
[7] M. Chandrasekar, S. Suresh, T. Senthilkumar, Mechanisms proposed through experimental investigations on thermophysical properties and forced convective heat transfer characteristics of various nanofluids–A review, Renewable and Sustainable Energy Reviews, 16(6) (2012) 3917-3938.
[8] J. Philip, P.D. Shima, Thermal properties of nanofluids, Advances in colloid and interface science, 183 (2012) 30-45.
[9] S. Suresh, K. Venkitaraj, P. Selvakumar, M. Chandrasekar, Effect of Al2O3–Cu/water hybrid nanofluid in heat transfer, Experimental Thermal and Fluid Science, 38 (2012) 54-60.
[10] S. Halelfadl, T. Maré, P. Estellé, Efficiency of carbon nanotubes water based nanofluids as coolants, Experimental Thermal and Fluid Science, 53 (2014) 104-110.
[11] M. Mehrali, E. Sadeghinezhad, S.T. Latibari, S.N. Kazi, M. Mehrali, M.N.B.M. Zubir, H.S.C. Metselaar, Investigation of thermal conductivity and rheological properties of nanofluids containing graphene nanoplatelets, Nanoscale research letters, 9(1) (2014) 15.
[12] D. Madhesh, R. Parameshwaran, S. Kalaiselvam, Experimental investigation on convective heat transfer and rheological characteristics of Cu–TiO2 hybrid nanofluids, Experimental Thermal and Fluid Science, 52 (2014) 104-115.
[13] Z. Haddad, H.F. Oztop, E. Abu-Nada, A. Mataoui, A review on natural convective heat transfer of nanofluids, Renewable and Sustainable Energy Reviews, 16(7) (2012) 5363-5378.
[14] A. Kuznetsov, D. Nield, Natural convective boundary-layer flow of a nanofluid past a vertical plate, International Journal of Thermal Sciences, 49(2) (2010) 243-247.
[15] A. Behseresht, A. Noghrehabadi, M. Ghalambaz, Natural-convection heat and mass transfer from a vertical cone in porous media filled with nanofluids using the practical ranges of nanofluids thermo-physical properties, Chemical Engineering Research and Design, 92(3) (2014) 447-452.
[16] D. Nield, A. Kuznetsov, The Cheng–Minkowycz problem for natural convective boundary-layer flow in a porous medium saturated by a nanofluid, International Journal of Heat and Mass Transfer, 52(25) (2009) 5792-5795.
[17] A. Noghrehabadi, M. Ghalambaz, A. Ghanbarzadeh, Effects of variable viscosity and thermal conductivity on natural-convection of nanofluids past a vertical plate in porous media, Journal of Mechanics, 30(3) (2014) 265-275.
[18] P. Keblinski, S. Phillpot, S. Choi, J. Eastman, Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids), International journal of heat and mass transfer, 45(4) (2002) 855-863.
[19] M.M. Seyed Hossein Hosseini, Investigate the methods available for the stability of nanofluids and their effect on thermal conductivity, Nanotechnology journal, 4 (12) 28-32  in persian.
[20] R. Rosensweig, Ferrohydrodynamics Dover, New York,  (1997).
[21] M. Krakov, I. Nikiforov, To the influence of uniform magnetic field on thermomagnetic convection in square cavity, Journal of Magnetism and Magnetic Materials, 252 (2002) 209-211.
[22] H. Yamaguchi, I. Kobori, Y. Uehata, Heat transfer in natural convection of magnetic fluids, Journal of thermophysics and heat transfer, 13(4) (1999) 501-507.
[23] H. Yamaguchi, I. Kobori, Y. Uehata, K. Shimada, Natural convection of magnetic fluid in a rectangular box, Journal of Magnetism and Magnetic materials, 201(1-3) (1999) 264-267.
[24] A. Gavili, M. Lajvardi, J. Sabbaghzadeh, The effect of magnetic field gradient on ferrofluids heat transfer in a two-dimensional enclosure, Journal of Computational and Theoretical Nanoscience, 7(8) (2010) 1425-1435.
[25] H. Kikura, T. Sawada, T. Tanahashi, Natural convection of a magnetic fluid in a cubic enclosure, Journal of Magnetism and Magnetic materials, 122(1-3) (1993) 315-318.
[26] T. Sawada, H. Kikura, A. Saito, T. Tanahashi, Natural convection of a magnetic fluid in concentric horizontal annuli under nonuniform magnetic fields, Experimental thermal and fluid science, 7(3) (1993) 212-220.
[27] S.M. Snyder, T. Cader, B.A. Finlayson, Finite element model of magnetoconvection of a ferrofluid, Journal of Magnetism and Magnetic Materials, 262(2) (2003) 269-279.
[28] D. Zablockis, V. Frishfelds, E. Blums, Numerical investigation of thermomagnetic convection in a heated cylinder under the magnetic field of a solenoid, Journal of physics: condensed matter, 20(20) (2008) 204134.
[29] M. Asfer, B. Mehta, A. Kumar, S. Khandekar, P.K. Panigrahi, Effect of magnetic field on laminar convective heat transfer characteristics of ferrofluid flowing through a circular stainless steel tube, International Journal of Heat and Fluid Flow, 59 (2016) 74-86.
[30] N. Hatami, A.K. Banari, A. Malekzadeh, A. Pouranfard, The effect of magnetic field on nanofluids heat transfer through a uniformly heated horizontal tube, Physics Letters A, 381(5) (2017) 510-515.
[31] M. Yarahmadi, H.M. Goudarzi, M. Shafii, Experimental investigation into laminar forced convective heat transfer of ferrofluids under constant and oscillating magnetic field with different magnetic field arrangements and oscillation modes, Experimental Thermal and Fluid Science, 68 (2015) 601-611.
[32] L.S. Sundar, M. Naik, K. Sharma, M. Singh, T.C.S. Reddy, Experimental investigation of forced convection heat transfer and friction factor in a tube with Fe3O4 magnetic nanofluid, Experimental Thermal and Fluid Science, 37 (2012) 65-71.
[33] Y.-C. Chiang, J.-J. Chieh, C.-C. Ho, The magnetic-nanofluid heat pipe with superior thermal properties through magnetic enhancement, Nanoscale research letters, 7(1) (2012) 322.
[34] M. Goharkhah, M. Ashjaee, M. Shahabadi, Experimental investigation on convective heat transfer and hydrodynamic characteristics of magnetite nanofluid under the influence of an alternating magnetic field, International Journal of Thermal Sciences, 99 (2016) 113-124.
[35] P. Berger, N.B. Adelman, K.J. Beckman, D.J. Campbell, A.B. Ellis, G.C. Lisensky, Preparation and properties of an aqueous ferrofluid, Journal of Chemical Education, 76(7) (1999) 943.
[36] T. Lee, J.H. Lee, Y.H. Jeong, Flow boiling critical heat flux characteristics of magnetic nanofluid at atmospheric pressure and low mass flux conditions, International Journal of Heat and Mass Transfer, 56(1-2) (2013) 101-106.
[37] O. Mahian, A. Kianifar, C. Kleinstreuer, A.-N. Moh’d A, I. Pop, A.Z. Sahin, S. Wongwises, A review of entropy generation in nanofluid flow, International Journal of Heat and Mass Transfer, 65 (2013) 514-532.
[38] F.P. Incropera, A.S. Lavine, T.L. Bergman, D.P. DeWitt, Fundamentals of heat and mass transfer, Wiley, 2007.
[39] A. Bejan, A.D. Kraus, Heat transfer handbook, John Wiley & Sons, 2003.
[40] M. Pastoriza-Gallego, L. Lugo, J. Legido, M. Piñeiro, Enhancement of thermal conductivity and volumetric behavior of Fe x O y nanofluids, Journal of Applied Physics, 110(1) (2011) 014309.
[41] M. Lajvardi, J. Moghimi-Rad, I. Hadi, A. Gavili, T.D. Isfahani, F. Zabihi, J. Sabbaghzadeh, Experimental investigation for enhanced ferrofluid heat transfer under magnetic field effect, Journal of Magnetism and Magnetic Materials, 322(21) (2010) 3508-3513.
[42] M. Yarahmadi, H. Moazami Goudarzi, M.B. Shafii, Experimental investigation into laminar forced convective heat transfer of ferrofluids under constant and oscillating magnetic field with different magnetic field arrangements and oscillation modes, Experimental Thermal and Fluid Science, 68 (2015) 601-611.
[43] K. Okada, H. Ozoe, Experimental heat transfer rates of natural convection of molten gallium suppressed under an external magnetic field in either the X, Y, or Z direction,  (1992).