Download Full Text

Abstract

The present paper describes the effect of heat transfer and fluid flow characteristics of rectangular microchannel under laminar flow conditions. Three dimensional model is created and simulated by applying suitable boundary conditions in the commercial CFD package ANSYS. Two microchannels with width 500 µm and 300 µm are considered for the present study. Water and nanofluid are chosen as working fluids. Two-phase mixture model is used for the modelling of microchannel working with nanofluid. Numerical model have been validated with the available experimental work in the literature. Then, the simulations were carried out for two different channels with nanofluid as working fluid. Heat transfer and flow characteristics of microchannels with nanofluid as working fluid have been obtained for different nanofluid volume concentrations. Finally, the comparison studies between water and nanofluid have been presented in order to understand the effective use of nanofluid as the heat transfer fluid.

References

1. Davarnejad, R., Barati, S., & Kooshki, M. (2013). CFD simulation of the effect of particle size on the nanofluids convective heat transfer in the developed region in a circular tube, 1–6.

2. Esmaeilnejad, A., Aminfar, H., & Neistanak, M. S. (2014). Numerical investigation of forced convection heat transfer through microchannels with non-Newtonian nanofluids. International Journal of Thermal Sciences, 75, 76–86. http://doi.org/10.1016/j.ijthermalsci.2013.07.020

3. Lee, P. S., Garimella, S. V., & Liu, D. (2005). Investigation of heat transfer in rectangular microchannels. International Journal of Heat and Mass Transfer, 48(9), 1688–1704. http://doi.org/10.1016/j.ijheatmasstransfer.2004.11.019

4. Nazififard, M., Nematollahi, M., Jafarpur, K., & Suh, K. Y. (2012). Numerical Simulation of Water-Based Alumina Nanofluid in Subchannel Geometry, 2012. http://doi.org/10.1155/2012/928406

5. Routbort, J. L., Singh, D., Timofeeva, E. V., Yu, W., & France, D. M. (2011). Pumping power of nanofluids in a flowing system. Journal of Nanoparticle Research, 13(3), 931–937. http://doi.org/10.1007/s11051-010-0197-7

6. Steinke, M. E., & Kandlikar, S. G. (2006). Single-phase liquid friction factors in microchannels. International Journal of Thermal Sciences, 45(11), 1073–1083. http://doi.org/10.1016/j.ijthermalsci.2006.01.016

7. Tuckerman, D. B., & Pease, R. F. W. (n.d.). High-performance heat sinking for VLSI High-Performance Heat Sinking for VLSI. IEEE Electron Device Letters, , Pp. 126-129, 2, no(June 1981), 126–129. http://doi.org/10.1109/EDL.1981.25367

8. Yu, W., France, D. M., Routbort, J. L., & Choi, S. U. S. (2008). Review and comparison of nanofluid thermal conductivity and heat transfer enhancements. Heat Transfer Engineering, 29(5), 432–460. http://doi.org/10.1080/01457630701850851

Keywords

Microchannel, Two-Phase Mixture Model, Nanofluids.