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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Experimental study on interfacial area concentration transport in air-water test loop

Dong-Jin Euh
Korea Atomic Energy Research Institute, Daedeok-daero, Yuseong-ku, Daejeon, 305-353, Korea

Byong-Jo Yun
Pusan National University, Busan; Korea Atomic Energy Research Institute, Daejeon, Korea

Chulhwa Song
Korea Atomic Energy Research Institute, Yusung P.O.Box 105, Daejeon 305-600, Korea

Won Man Park
Korea Atomic Energy Research Institute, Yusung P.O.Box 105, Daejeon 305-600, Korea

Moon Ki Chung
Korea Atomic Energy Research Institute, Yusung P.O.Box 105, Daejeon 305-600, Korea

Un Chul Lee
Department of Nuclear Engineering, Seoul National University San 56-1 Sillim-Dong, Kwanak-Gu, Seoul, 151-742, Korea

DOI: 10.1615/IHTC12.960
6 pages

Abstract

Recently, studies of the mechanistic modeling for the interfacial area concentration (IAC) are being performed using multi-group transport equations bysom e investigators. For the mechanistic modeling, the transport phenomena of IAC are main concerns to be investigated and experimental database for the IAC are needed for their evaluation and assessment.
In this study, experiment data for the IAC are produced and its transport phenomena along the flow path are investigated byusi ng the five-sensor conductivitypro be in an air-water test loop with a flow channel diameter of 0.08m, which correspond to bubblyand slug flow in the flow regime map. The IAC transport phenomena are examined bym easuring the IAC at vertical three positions: L/D=12.2, 42.2, 100.7. In this study, the bubbles are categorized into two groups based on their size, and IAC and void fraction data of each group are generated respectively. Since the IAC data are classified into two groups, the data could be directly used to model the IAC bytwo group interfacial area transport equations.

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