TY - JOUR ID - 38867 TI - Three-dimensional CFD modeling of fluid flow and heat transfer characteristics of Al2O3/water nanofluid in microchannel heat sink with Eulerian-Eulerian approach JO - Iranian Journal of Chemical Engineering(IJChE) JA - IJCHE LA - en SN - 1735-5397 AU - Hadi Najafabadi, Hossein AU - Keshavarz Moraveji, Mostafa AD - Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran. AD - Amirkabir university of technology (Tehran Polytechnic) Y1 - 2016 PY - 2016 VL - 13 IS - 4 SP - 46 EP - 61 KW - Nanofluid KW - Microchannel KW - convective heat transfer KW - friction factor KW - Entropy generation KW - CFD DO - N2 - In this paper, three-dimensional incompressible laminar fluid flow in a rectangular microchannel heat sink (MCHS) using Al2O3/water nanofluid as a cooling fluid is numerically studied. CFD prediction of fluid flow and forced convection heat transfer properties of nanofluid using single-phase and two-phase model (Eulerian-Eulerian approach) are compared. Hydraulic and thermal performance of microchannels are investigated according to the results of the friction factor, pumping power, average heat transfer coefficient, thermal resistance, average temperature of the walls and entropy generation. In addition, due to the CFD results, two correlations for predication of Nusselt number and friction factor are presented. Comparing the predicted Nusselt number using single-phase and two-phase models with experimental data shows that the two-phase model is more accurate than single-phase model. The results show that increasing the volume fraction of nanoparticles leads to increases the heat transfer coefficient and reduces the heat sink wall temperature, but it leads to the undesirable effect of increase in pumping power and total entropy generation. UR - https://www.ijche.com/article_38867.html L1 - https://www.ijche.com/article_38867_62b709c5bfdfe9fa33afa1565f43a71c.pdf ER -