Critical Heat Flux (CHF) of Subcooled Flow Boiling of Alumina Nanofluids in a Horizontal Microchannel
Critical Heat Flux (CHF) of Subcooled Flow Boiling of Alumina Nanofluids in a Horizontal Microchannel
复制标题
水平微通道中氧化铝纳米流体过冷流动沸腾的临界热通量 (CHF)
DOI：
10.1115/1.4001629
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Vafaei S
中科院分区：
文献类型：
--
作者：
Vafaei S
本文研究了纳米颗粒对单微通道内水基氧化铝纳米流体的过冷流动沸腾特性的影响。同时测量了不同浓度的氧化铝纳米流体和去离子水的表面温度沿着分布、入口和出口压力和温度。为了最小化纳米颗粒沉积的影响，所有的纳米流体实验都是在新鲜的微通道上进行的。实验表明，在很低的纳米颗粒浓度（0.1体积%）下的临界热通量的增加。水和纳米流体之间观察到不同的燃尽特性，以及不同的压力和温度波动和流型发展在稳定沸腾期间。沸腾表面的详细观察表明，纳米颗粒的沉积和随后的修改的沸腾表面是与纳米流体，这应该是负责不同的沸腾行为的纳米流体的共同特征。
This work investigates subcooled flow boiling of aqueous based alumina nanofluids insingle microchannels with a focus on the effect of nanoparticles on the critical heat flux. The surface temperature distribution along the pipe, the inlet and outlet pressures and temperatures are measured simultaneously for different concentrations of alumina nanofluids and de-ionized water. To minimize the effect of nanoparticle depositions, all nanofluid experiments are performed on fresh microchannels. The experiment shows an increase ofin the critical heat flux under very low nanoparticle concentrations (0.1 vol %). Different burnout characteristics are observed between water and nanofluids, as well as different pressure and temperature fluctuations and flow pattern development during the stable boiling period. Detailed observations of the boiling surface show that nanoparticle deposition and a subsequent modification of the boiling surface are common features associated with nanofluids, which should be responsible for the different boiling behaviors of nanofluids.
DOI：
10.1016/j.ijheatmasstransfer.2008.01.034
发表时间：
2008-09
影响因子：
5.2
作者：
D. Wen
通讯作者：
D. Wen
影响因子：
2.2
作者：
D. Wen;L. Zhang;Yurong He
通讯作者：
D. Wen;L. Zhang;Yurong He