Numerical Investigation of the Water/Alumina Nanofluid within a Microchannel with Baffles

Mehdi Jahangiri, Rouhollah Yadollahi Farsani, Akbar Alidadi Shamsabadi

Abstract


The study of heat transfer phenomenon in microchannels has attracted researchers’ attention as they have many advantages in the cooling of electronic components. In this numerical study, the effect of adding alumina nanoparticles to the water flow through a microchannel with some baffles embedded on the top and bottom walls is numerically discussed by using ANSYS Fluent software. The several cases including the effect of various volume fraction of nanoparticles (2, 4, 6, and 10%), Reynolds number of the inlet flow (10, 20, 30, 40, and 50), and the number of baffles and their heights on the heat transfer phenomena are investigated. The local Nusselt number, the average outlet temperature, and the streamlines are presented for representing the results. The results show that increasing the Reynolds number decreases the average outlet temperature. Moreover, the increase in the number of baffles causes an increase in the average outlet temperature since the formation of vorticities just behind of each baffle and results in a large heat transfer rate. As the baffles height increase, the strength and the area of the vortices increase and hence the heat transfer rate increases. However, an increase in the volume fraction of the nanoparticle increases the average outlet temperature which is due to the increase in conduction heat transfer of nanofluid


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References


Akbarinia, A., Abdolzadeh, M. & Laur, R. (2011). Critical investigation of heat transfer enhancement using nanofluids in microchannels with slip and non-slip flow regimes. Applied Thermal Engineering, 31(4), 556-565.

Alfaryjat, A.A., Mohammed, H.A., Adam, N.M., Stanciu, D. & Dobrovicescu, A. (2018). Numerical investigation of heat transfer enhancement using various nanofluids in hexagonal microchannel heat sink. Thermal Science and Engineering Progress, 5, 252-262.

Ambreen, T. & Kim, M.H. (2018). Effects of variable particle sizes on hydrothermal characteristics of nanofluids in a microchannel. International Journal of Heat and Mass Transfer, 120, 490-498.

Azizi, Z., Alamdari, A. & Malayeri, M.R. (2016). Thermal performance and friction factor of a cylindrical microchannel heat sink cooled by Cu-water nanofluid. Applied Thermal Engineering, 99, 970-978.

Bar-Cohen, A. (2013(. Gen-3 thermal management technology: role of microchannels and nanostructures in an embedded cooling paradigm. Journal of Nanotechnology in Engineering and Medicine, 4(2), 020907.

Chari, S. & Kleinstreuer, C. (2018). Convective mass and heat transfer enhancement of nanofluid streams in bifurcating microchannels. International Journal of Heat and Mass Transfer, 125, 1212-1229.

Chein, R. & Huang, G. (2005). Analysis of microchannel heat sink performance using nanofluids. Applied thermal engineering, 25(17-18), 3104-3114.

Colgan, E.G., Furman, B., Gaynes, M., Graham, W.S., LaBianca, N.C., Magerlein, J.H., Polastre, R.J., Rothwell, M.B., Bezama, R.J., Choudhary, R. & Marston, K.C. (2007). A practical implementation of silicon microchannel coolers for high power chips. IEEE Transactions on Components and Packaging Technologies, 30(2), 218-225.

Dixit, T. & Ghosh, I. (2015). Review of micro-and mini-channel heat sinks and heat exchangers for single phase fluids. Renewable and Sustainable Energy Reviews, 41, 1298-1311.

Ganvir, R.B., Walke, P.V. & Kriplani, V.M. (2017). Heat transfer characteristics in nanofluid—A review. Renewable and Sustainable Energy Reviews, 75, 451-460.

Hajmohammadi, M.R., Alipour, P. & Parsa, H. (2018). Microfluidic effects on the heat transfer enhancement and optimal design of microchannels heat sinks. International Journal of Heat and Mass Transfer, 126, 808-815.

Lee, J. & Mudawar, I. (2009). Low-temperature two-phase microchannel cooling for high-heat-flux thermal management of defense electronics. IEEE transactions on components and packaging technologies, 32(2), 453-465.

Lewis, J.M. & Wang, Y. (2018). Two-phase frictional pressure drop and water film thickness in a thin hydrophilic microchannel. International Journal of Heat and Mass Transfer, 127, 813-828.

Li, Z., Tao, W.Q. & He, Y.L. (2006). A numerical study of laminar convective heat transfer in microchannel with non-circular cross-section☆. International journal of thermal sciences, 45(12), 1140-1148.

Maı̈ga, S.E.B., Nguyen, C.T., Galanis, N. & Roy, G. (2004). Heat transfer behaviours of nanofluids in a uniformly heated tube. Superlattices and Microstructures, 35(3), 543-557.

Manay, E. & Sahin, B. (2016). The effect of microchannel height on performance of nanofluids. International Journal of Heat and Mass Transfer, 95, 307-320.

Minkowycz, W.J., Sparrow, E.M. and Abraham, J.P. (2016). Nanoparticle heat transfer and fluid flow. CRC press.

Sakanova, A., Yin, S., Zhao, J., Wu, J.M. & Leong, K.C. (2014). Optimization and comparison of double-layer and double-side micro-channel heat sinks with nanofluid for power electronics cooling. Applied Thermal Engineering, 65(1-2), 124-134.

Tuckerman, D.B. & Pease, R.F.W. (1981(. High-performance heat sinking for VLSI. IEEE Electron device letters, 2(5), 126-129.

Zhang, R., Chen, Z., Xie, G. & Sunden, B. (2015). Numerical analysis of constructal water-cooled microchannel heat sinks with multiple bifurcations in the entrance region. Numerical Heat Transfer, Part A: Applications, 67(6), 632-650.




DOI: http://dx.doi.org/10.2022/jmet.v10i2.4759

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