期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 53, 期 1-3, 页码 58-67出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2009.10.008
关键词
Heat transfer enhancement; Critical heat flux; Pool boiling; Thin-film coatings
资金
- National Science Foundation [DMR 02-13282]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [819762] Funding Source: National Science Foundation
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.
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