Thermal Performance Analysis of Nanofluids in Microchannel Heat Sinks

Authors: Manay E., Sahin B., Yilmaz M., Gelis K.

Abstract:

In the present study, the pressure drop and laminar convection heat transfer characteristics of nanofluids in microchannel heat sink with square duct are numerically investigated. The water based nanofluids created with Al2O3 and CuO particles in four different volume fractions of 0%, 0.5%, 1%, 1.5% and 2% are used to analyze their effects on heat transfer and the pressure drop. Under the laminar, steady-state flow conditions, the finite volume method is used to solve the governing equations of heat transfer. Mixture Model is considered to simulate the nanofluid flow. For verification of used numerical method, the results obtained from numerical calculations were compared with the results in literature for both pure water and the nanofluids in different volume fractions. The distributions of the particles in base fluid are assumed to be uniform. The results are evaluated in terms of Nusselt number, the pressure drop and heat transfer enhancement. Analysis shows that the nanofluids enhance heat transfer while the Reynolds number and the volume fractions are increasing. The best overall enhancement was obtained at φ=%2 and Re=100 for CuO-water nanofluid.

Keywords: Microchannel Heat Sink, Nanofluid, Heat transfer enhancement, pressure drop

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1059539

References:

[1] Xuan, Y., Li, Q., 2000, Heat transfer enhancement of nanofluids, International Journal of Heat and Fluid Flow, 21/1, 58-64.
[2] Xuan Y. and Roetzel W., 2000, Conceptions for heat transfer correlation of nanofluids. International Journal of Heat and Mass Transfer 43:3701- 7.
[3] Behzadmehr A, Saffar-Avval M, Galanis N. 2007, Prediction of turbulent forced convection of a nanofluid in a tube with uniform heat flux using two phase approach, International Journal of Heat and Fluid Flow, 28(2), 211-9.
[4] Duangthongsuk W. and Wongwises S., 2010, An experimentalstudy on the heat transfer performance and pressure drop of TiO2-water nanofluids flowing under a turbulent flow regime, International Journal of Heat and Mass Transfer. 53,334-344.
[5] Akbarinia, A.,Abdolzadeh, M. and Laur, R., (2011), Critical investigation of heat transfer enhancementusingnanofluids in microchannelswith slip andnon-slip flowregimes, Applied Thermal Engineering, 31, 556-565.
[6] Chen, C. H. and Ding, C. Y., (2011), Study on thethermal behavior and cooling performance of a nanofluid-cooled microchannel heat sink, International Journal of Thermal Sciences, 50, 378-384.
[7] Lelea, D., (2011), Theperformanceevaluation of Al2O3-water nano fluid flow and heat transfer in microchannel heat sink, International Journal of Heat and Mass Transfer, 54, 3891-3899.
[8] Ho, C.J., Wei, L.C. and Li Z.W., (2010), An experimental investigation of forced convective cooling performance of a microchannel heat sink with Al2O3/water nanofluid, Applied Thermal Engineering, 30, 96-103.
[9] Lee, J. and Mudawar, I. (2007), Assessment of the effectiveness of nanofluids for single-phase and two-phase heat transfer in microchannels, International Journal of Heat and Mass Transfer, 50, 452-463.
[10] Chein, R. and Chuang, J., (2007), Experimental microchannel heat sink performance studies using nanofluids, International Journal of Thermal Sciences, 46, 57-66.
[11] Chein, R. and Huang, G., (2005), Analysis of microchannel heat sink performance using nanofluids, Applied Thermal Engineering, 25, 3104- 3114.
[12] Kalteh, M.,Abbassi, A., Saffar-Avval, M. andHarting, J., (2011), Eulerian-Euleriantwo-phase numerical simulation of nanofluid laminar forced convection in a microchannel, International Journal of Heat and Fluid Flow, 32, 107-116.
[13] Ghazvini, M. and Shokouhmand, H., (2009), Investigation of a nanofluid-cooled microchannel heat sink using Fin and porous media approaches, Energy Conversion and Management , 50, 2373-2380.
[14] Jang, S.P. and Choi, S.U.S., (2006), Cooling performance of a microchannel heat sink with nanofluids, Applied Thermal Engineering, 26, 2457-2463.
[15] Tsai, T.H. and Chein, R., (2007), Performance analysis of nanofluidcooled microchannel heat sinks, International Journal of Heat and Fluid Flow, 28, 1013-1026.
[16] Li, J. and Kleinstreuer, C. (2008), Thermal performance of nanofluid flow in microchannels, International Journal of Heat and Fluid Flow, 29, 1221-1232.
[17] Mohammed, H. A.,Bhaskaran, G., Shuaib, N. H. and Abu-Mulaweh, H. I., (2011), Influence of nanofluids on parallel flow square microchannel heat exchanger performance, International Communications in Heat and Mass Transfer, 38, 1-9.
[18] FLUENT 6.1.22., User-s Guide, Fluent Incorporated, Centerra Resource Park, 10 Cavendish Court, Lebanon, NH 03766, USA, 2001.