An experimental study on deposited surfaces due to nanofluid pool boiling: Comparison between rough and smooth surfaces
An experimental study on deposited surfaces due to nanofluid pool boiling: Comparison between rough and smooth surfaces
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DOI：
10.1016/j.expthermflusci.2017.06.007
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发表时间：
2017-11-01
影响因子：
3.2
通讯作者：
Afrand, Masoud
中科院分区：
文献类型：
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作者：
Salimpour, Mohammad Reza;Abdollahi, Ali;Afrand, Masoud
本文研究了常压下氧化铁/去离子水纳米流体在铜平板上的沸腾传热。进行测量，以评估纳米流体的浓度，表面类型，表面粗糙度，沉积厚度，和热通量的沸腾实验后的表面粗糙度的影响。为此，通过实验研究了纳米流体在光滑表面和粗糙表面上的沉降对纳米流体沸腾传热的影响。结果表明，粗糙表面沸腾实验后，纳米流体的沸腾换热在低热流密度下有所降低，而在高热流密度下有所增加。此外，在光滑表面上进行沸腾实验后，纳米流体的沸腾传热在低热流密度下有所增加，而在高热流密度下没有变化。结果还表明，在高纳米流体浓度下，表面沉积的影响更加明显。此外，对于具有高热流密度的粗糙表面和具有低热流密度的光滑表面，观察到通过在表面上形成存款可以增加沸腾传热。(C)2017爱思唯尔公司All rights reserved.
This paper presents an investigation of the boiling heat transfer of iron oxide/de-ionized water nanofluid on a flat copper surface under atmospheric pressure. Measurements were conducted to evaluate the effects of nanofluid concentration, surface type, surface roughness, sedimentation thickness, and heat flux on the roughness of the surface after boiling experiments. For this purpose, the effect of sedimentation of the nanofluid on both the smooth and the rough surfaces on the boiling heat transfer of the nano fluid was investigated through some experiments. Results showed that after the boiling test on the rough surface, boiling heat transfer of nanofluids reduced at low heat fluxes, while it increased in high heat fluxes. Moreover, after the boiling test on the smooth surface, boiling heat transfer of nanofluids increased at low heat fluxes, while it did not change in high heat fluxes. Results also indicated that the effects of surface deposition were more evident at high nanofluid concentrations. Furthermore, for rough surfaces with high heat flux and smooth surfaces with low heat flux, it was observed that boiling heat transfer can be increased by making a deposit on the surface. (C) 2017 Elsevier Inc. All rights reserved.