Explosive lift-off triggering mechanism on a surface with micropillar arrays: Liquid-vapor interface behavior between micropillars during drop impingement
SCIE
SCOPUS
- Title
- Explosive lift-off triggering mechanism on a surface with micropillar arrays: Liquid-vapor interface behavior between micropillars during drop impingement
- Authors
- Park, Su Cheong; Kim, Moo Hwan; Wongwises, Somchai; Yu, Dong In; Ahn, Ho Seon
- Date Issued
- 2022-01
- Publisher
- Pergamon Press Ltd.
- Abstract
- Generally, three classified hydrodynamic behaviors of impinging water drops involving corresponding boiling heat transfer regimes have been reported under low Weber number conditions (We < 20): contact boiling (nucleate boiling), transition rebound (transition boiling), and Leidenfrost rebound (film boiling). In previous studies of drop impingement on a structured surface, an explosive lift-off regime, which is characterized by lift-off from the surface within 1 ms without any disturbance at the top side of the drop, was reported, and the triggering hypothesis of explosive lift-off suggested had no quantitative evidence. In this study, the outcomes of water drop impingement onto a heated surface with micropillar arrays were investigated using a high-speed imaging system, for wall temperatures between 150 and 380 degrees C and a Weber number of approximately 4. Pool boiling experiments were conducted to validate the triggering hypothesis of explosive lift-off, as suggested by previous researchers. Based on the experimental results, the triggering mechanism of the explosive lift-off is discussed.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/117965
- DOI
- 10.1016/j.applthermaleng.2021.117739
- ISSN
- 1359-4311
- Article Type
- Article
- Citation
- Applied Thermal Engineering, vol. 201, 2022-01
- 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.