Heydari, M., Toghraie, D., Akbari, O. (2016). The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), 419-430.

Mousa Heydari; Davood Toghraie; Omid Ali Akbari. "The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 3, 2016, 419-430.

Heydari, M., Toghraie, D., Akbari, O. (2016). 'The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), pp. 419-430.

Heydari, M., Toghraie, D., Akbari, O. The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(3): 419-430.

The numerical study of heat transfer of water-TiO2 nanofluid in the triangular microchannels with semiattached and offset mid-truncated rib,s

^{1}MSc, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran

^{2}Assistant Professor, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan

^{3}Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran

Abstract

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.

[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