Augmentation of nucleate boiling heat transfer and critical heat flux using nanoparticle thin-film coatings
Augmentation of nucleate boiling heat transfer and critical heat flux using nanoparticle thin-film coatings
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DOI：
10.1016/j.ijheatmasstransfer.2009.10.008
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发表时间：
2010-01-15
影响因子：
5.2
通讯作者：
Cohen, Robert
中科院分区：
文献类型：
--
作者：
Forrest, Eric;Williamson, Erik;Cohen, Robert
采用逐层组装方法在沸腾表面制备纳米粒子薄膜涂层，可显著提高池沸腾临界热流密度(CHF)和核沸腾换热系数。镀覆不同二氧化硅纳米薄膜的镍丝的池沸腾临界热流密度提高了100%，换热系数提高了100%以上。表面表征表明，随着涂层的应用，表面润湿性发生了显著变化，而表面粗糙度几乎没有变化。结果表明，这些涂层的纳米孔结构和化学成分的耦合导致了沸腾行为的增强。(C)2009爱思唯尔有限公司。保留所有权利。
Nanoparticle thin-film coatings applied to boiling surfaces using a layer-by-layer (LbL) assembly method demonstrated significant enhancement in the pool boiling critical heat flux (CHF) and nucleate boiling heat transfer coefficient. Up to 100% enhancement of the critical heat flux and over 100% enhancement of the heat transfer coefficient were observed for pool boiling of nickel wires coated with different thin-films of silica nanoparticles. Surface characterization revealed that the surface wettability changed drastically with the application of these coatings, while causing virtually no change in the surface roughness. It is concluded that the nanoporous structure coupled with the chemical constituency of these coatings leads to the enhanced boiling behavior. (C) 2009 Elsevier Ltd. All rights reserved.