THE EFFECT OF MICRO/NANOSCALE STRUCTURES ON CHF ENHANCEMENT
SCIE
SCOPUS
KCI
- Title
- THE EFFECT OF MICRO/NANOSCALE STRUCTURES ON CHF ENHANCEMENT
- Authors
- Ahn, HS; Kim, MH
- Date Issued
- 2011-06
- Publisher
- KOREAN NUCLEAR SOC
- Abstract
- Recently, many research studies have investigated the enormous critical heat flux (CHF) enhancement caused by nanofluids during pool boiling and flow boiling. One of the main reasons for this enhancement is nanoparticle deposition on the heated surface. However, in real applications, nanofluids create many problems when used as working fluids because of sedimentation and aggregation. Therefore, artificial surfaces on silicon and metal have been developed to create an effect similar to that of nanoparticle deposition. These modified surfaces have proved capable of greatly increasing the CHF during pool boiling, and good results have also been observed during flow boiling. In this study, we demonstrate that the wetting ability of a surface, i.e., wettability, and the liquid spreading ability (hydrophilic surface property), are key parameters for increasing the CHF during both pool and flow boiling. We also demonstrate that when the fuel surface in nuclear power plants is modified in a similar manner, it has the same effect, producing a large CHF enhancement.
- Keywords
- Critical Heat Flux; Pool Boiling; Flow Boiling; Wettability; Spreading; Nanostructure; Microstructure; Surface Modification; BOILING HEAT-TRANSFER; NANO-FLUIDS; SURFACE; NANOPARTICLES; NANOFLUID; WICKING; FLUX
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/17207
- DOI
- 10.5516/NET.2011.43.3.205
- ISSN
- 1738-5733
- Article Type
- Article
- Citation
- NUCLEAR ENGINEERING AND TECHNOLOGY, vol. 43, no. 3, page. 205 - 216, 2011-06
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.