Two-phase flow regimes for counter-current air-water flows in narrow rectangular channels
- Authors
- Kim, BJ; Sohn, BH; Jeong, S
- Issue Date
- Jul-2001
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- counter-current two-phase flow; narrow rectangular channel; void fraction; flow regime transition; flow regime map
- Citation
- KSME INTERNATIONAL JOURNAL, v.15, no.7, pp.941 - 950
- Journal Title
- KSME INTERNATIONAL JOURNAL
- Volume
- 15
- Number
- 7
- Start Page
- 941
- End Page
- 950
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/27200
- DOI
- 10.1007/BF03185272
- ISSN
- 1226-4865
- Abstract
- A study of counter-current two-phase flow in narrow rectangular channels has been performed. Two-phase flow regimes were experimentally investigated in a 760 mm long and 100 mm wide test section with 2.0 and 5.0 mm gap widths. The resulting flow regime maps were compared with the existing transition criteria. The experimental data and the transition criteria of the models showed relatively good agreement, However, the discrepancies between the experimental data and the model predictions of the flow regime transition became pronounced as the gap width increased. As the gap width increased the transition gas superficial velocities increased. The critical void fraction for the bubbly-to-slug transition was observed to be about 0.25. The two-phase distribution parameter for the slug flow was larger for the narrower channel. The uncertainties in the distribution parameter could lead to a disagreement in slug-to-churn transition between the experimental findings and the transition criteria, For the transition from churn to annular flow the effect of liquid superficial velocity was found to be insignificant.
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Collections - College of Engineering > Department of Mechanical and System Design Engineering > 1. Journal Articles
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