The performance evaluation of Al2O3/water nanofluid flow and heat transfer in microchannel heat sink
The performance evaluation of Al2O3/water nanofluid flow and heat transfer in microchannel heat sink
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DOI：
10.1016/j.ijheatmasstransfer.2011.04.038
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发表时间：
2011-08
影响因子：
5.2
通讯作者：
D. Lelea
中科院分区：
文献类型：
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作者：
D. Lelea
本文对Al 2 O 3 /水纳米流体通过微通道散热器的共轭传热和流体流动进行了数值模拟。层流流态与粘性耗散效应一起被考虑。考虑具有方形微通道、D h= 50 μm 的微通道散热器。在加热和冷却情况下，热通量固定为 q= 35 W/m 2 。水基Al 2 O 3 纳米流体具有不同体积浓度的Al 2 O 3 颗粒 phi= 1–9% 和三种颗粒直径 d p= 13、28 和 47 nm。对基于固定泵功率的局部传热系数获得的结果进行分析。与基于常数 Re 进行的分析相比，结果揭示了不同的局部传热行为。
The numerical modeling of the conjugate heat transfer and fluid flow of Al 2 O 3/water nanofluid through the microchannel heat sink is presented in the paper. The laminar flow regime was considered along with viscous dissipation effect. The microchannel heat sink with square microchannels and D h= 50 μm is considered. The heat flux was fixed to q= 35 W/m 2 with heating and cooling cases. The water based Al 2 O 3 nanofluid was encountered with various volume concentrations of Al 2 O 3 particles ϕ= 1–9% and three diameters of the particle d p= 13, 28 and 47 nm. The analysis is performed on the results obtained for the local heat transfer coefficients based on a fixed pumping power. The results reveal a different local heat transfer behavior compared to the analysis made on a basis of the constant Re.