RT Journal Article ID 1f0c020242082edc A1 Dong, Shuangling A1 Zheng, Liancun A1 Zhang, Xinxin A1 Zhang, Junhong T1 HEAT TRANSFER ENHANCEMENT IN MICROCHANNELS BY UTILIZING THE Al2O3−WATER NANOFLUID JF Heat Transfer Research JO HTR YR 2012 FD 2012-12-28 VO 43 IS 8 SP 695 OP 707 K1 nanofluid K1 microchannel K1 heat transfer K1 MEMS K1 forced convection K1 finite element method AB Heat transfer enhancement by utilizing nanofluids in a microchannel flow is investigated for specific flow regimes and boundary conditions. Accompanied with the slip velocity and jump temperature boundary conditions, the governing mass, momentum, and energy equations for a nanofluid flow inside a microchannel have been discretized using the characteristic finite element method. The above equations are improved and solved taking into account the particle dispersion and anomalous diffusion due to the particle random motion. Based on theoretical models and experimental correlations, the thermal conductivity and viscosity coefficients required for simulation were used. Based upon numerical simulations, the effects of Reynolds number and the volume fraction of nanoparticles on heat transfer from the channel walls are presented. Simulated results shows reasonably good agreement with the previous numerical and experimental data. An obvious increase in the averaged Nusselt number is found for the nanofluid. The results provide insight into the statement that nanoparticles can increase the rate of heat transfer in microchannels. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,28e6d2647e519080,1f0c020242082edc.html