Development of interfacial structure in a confined air-water cap-turbulent and churn-turbulent flow

Xiaodong Sun, Seungjin Kim, Ling Cheng, Mamoru Ishii, Stephen G. Beus

    Research output: Contribution to conferencePaperpeer-review

    2 Scopus citations

    Abstract

    The objective of the present work is to study and model the interfacial structure development of air-water two-phase flow in a confined test section. Experiments of a total of 9 flow conditions in cap-turbulent and churn-turbulent flow regimes are carried out in a vertical air-water upward two-phase flow experimental loop with a test section of 200-mm in width and 10-mm in gap. Miniaturized four-sensor conductivity probes are used to measure local two-phase parameters at three different elevations for each flow condition. The bubbles captured by the probes are categorized into two groups in view of the two-group interfacial area transport equation, i.e., spherical/distorted bubbles as Group 1 and cap/churn-turbulent bubbles as Group 2. The acquired parameters are time-averaged local void fraction, interfacial velocity, bubble number frequency, interfacial area concentration, and bubble Sauter mean diameter for both groups of bubbles. Also, the line-averaged and area-averaged data are presented and discussed. The comparisons of these parameters at different elevations demonstrate the development of interfacial structure along the flow direction due to bubble interactions.

    Original languageEnglish (US)
    Pages987-996
    Number of pages10
    DOIs
    StatePublished - Oct 19 2002
    Event10th International Conference on Nuclear Engineering (ICONE 10) - Arlington, VA, United States
    Duration: Apr 14 2002Apr 18 2002

    Other

    Other10th International Conference on Nuclear Engineering (ICONE 10)
    Country/TerritoryUnited States
    CityArlington, VA
    Period4/14/024/18/02

    All Science Journal Classification (ASJC) codes

    • Nuclear Energy and Engineering

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