Supersonically sprayed nanotextured surfaces with silver nanowires for enhanced pool boiling
- Authors
- Jo, Hong Seok; Kim, Tae Gun; Lee, Jong-Gun; Kim, Min-Woo; Park, Hyun Goo; James, Scott C.; Choi, Jeehoon; Yoon, Sam S.
- Issue Date
- 8월-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Supersonic spraying; Silver nanowire; Pool boiling; Superheat temperature; Critical heat flux
- Citation
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.123, pp.397 - 406
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
- Volume
- 123
- Start Page
- 397
- End Page
- 406
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/73873
- DOI
- 10.1016/j.ijheatmasstransfer.2018.02.092
- ISSN
- 0017-9310
- Abstract
- Rapid production of nanoscale-textured surfaces for microscale devices is important for commercial applications. In this study, we introduce a commercially viable method to fabricate nanotextured surfaces used in pool-boiling heat-transfer applications. Silver nanowires were supersonically sprayed onto copper substrates with good adhesive strength. The coating method required little time and could be adapted for roll-to-roll processing. The fabricated nanotextured surfaces showed a significantly increased critical heat flux (CHF) and effective heat transfer coefficient (h(eff)), as evidenced by the release of numerous bubbles from nanotextured nucleation sites during pool-boiling. The silver nanowires were well connected either by self-sintering or due to the fusion induced by supersonic impacts with the copper substrate. The thickness of the coated layer could be controlled by the number of spray sweeps/passes and the optimal thickness for maximizing CHF and h(eff )was identified. The nanotextured surfaces were characterized by scanning electron microscopy and by bubble formation and release as visualized with a charge-coupled device camera. (C) 2018 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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