Visualized effect of alumina nanoparticles surface deposition on water flow boiling heat transfer
SCIE
SCOPUS
- Title
- Visualized effect of alumina nanoparticles surface deposition on water flow boiling heat transfer
- Authors
- Ho Seon Ahn; Soon Ho Kang; Kim, MH
- Date Issued
- 2012-02
- Publisher
- ELSEVIER SCIENCE INC
- Abstract
- The critical heat flux (CHF) enhancements obtained using nanofluids during pool boiling are well known, and the resulting delay reaching the film-boiling regime due to nanoparticles deposition on the heater surface has been investigated [1]. In this study, water boiling on a nanoparticles-coated heater was conducted at flow velocities ranging from 0 to 4 m/s, and the boiling heat transfer performance was assessed. Based on previous wetting-zone results, the nucleate boiling phenomenon was visualized using a highspeed video camera. Different wetting zones on bare and nanoparticles coated heaters were observed, and these influenced the boiling heat transfer performance. Additionally, the nucleate boiling wetting-zone fraction on the heater surface was related to the surface wettability. A new concept for a flow boiling model was proposed based on the wetting-zone fraction and was found to be in good agreement with the experimental data. (C) 2011 Elsevier Inc. All rights reserved.
- Keywords
- Flow boiling; Boiling heat transfer; Nanofluids; Nanoparticles; Wettability; NUCLEATION SITE DENSITY; CONVECTIVE FLOW; NANO-FLUIDS; POOL; WETTABILITY; NANOFLUID; FLUX
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16714
- DOI
- 10.1016/J.EXPTHERMFLUSCI.2011.10.017
- ISSN
- 0894-1777
- Article Type
- Article
- Citation
- Experimental Thermal and Fluid Science, vol. 37, page. 154 - 163, 2012-02
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