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ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561
Indexed in
HEAT TRANSFER ENHANCEMENT IN MICROCHANNELS BY UTILIZING THE Al2O3−WATER NANOFLUID
Краткое описание
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.
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Guo Yufeng, Zhang Tongtong, Zhang Dongrui, Wang Qi, Experimental investigation of thermal and electrical conductivity of silicon oxide nanofluids in ethylene glycol/water mixture, International Journal of Heat and Mass Transfer, 117, 2018. Crossref