Modeling of bubble coalescence and disintegration in confined upward two-phase flow

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

    Research output: Contribution to journalConference articlepeer-review

    161 Scopus citations


    This paper presents the modeling of bubble interaction mechanisms in the two-group interfacial area transport equation (IATE) for confined gas-liquid two-phase flow. The transport equation is applicable to bubbly, cap-turbulent, and churn-turbulent flow regimes. In the two-group IATE, bubbles are categorized into two groups: spherical/distorted bubbles as Group 1 and cap/slug/churn-turbulent bubbles as Group 2. Thus, two sets of equations are used to describe the generation and destruction rates of bubble number density, void fraction, and interfacial area concentration for the two groups of bubbles due to bubble expansion and compression, coalescence and disintegration, and phase change. Five major bubble interaction mechanisms are identified for the gas-liquid two-phase flow of interest, and are analytically modeled as the source/sink terms for the transport equation in the confined flow. These models include both intra-group and inter-group bubble interactions.

    Original languageEnglish (US)
    Pages (from-to)3-26
    Number of pages24
    JournalNuclear Engineering and Design
    Issue number1-3
    StatePublished - May 2004
    Event11th International Conference on Nuclear Energy - Tokyo, Japan
    Duration: Apr 20 2003Apr 23 2003

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Nuclear and High Energy Physics
    • Safety, Risk, Reliability and Quality
    • Waste Management and Disposal
    • General Materials Science
    • Nuclear Energy and Engineering


    Dive into the research topics of 'Modeling of bubble coalescence and disintegration in confined upward two-phase flow'. Together they form a unique fingerprint.

    Cite this