Interfacial structures and regime transition in co-current downward bubbly flow

S. Kim, S. S. Paranjape, M. Ishii, J. Kelly

    Research output: Contribution to journalArticlepeer-review

    19 Scopus citations


    The vertical co-current downward air-water two-phase flow was studied under adiabatic condition in round tube test sections of 25.4-mm and 50.8-mm ID. Inflow regime identification, a new approach was employed to minimize the subjective judgment. It was found that the flow regimes in the co-current downward flow strongly depend on the channel size. In addition, various local two-phase flow parameters were acquired by the multisensor miniaturized conductivity probe in bubbly flow. Furthermore, the area-averaged data acquired by the impedance void meter were analyzed using the drift flux model. Three different distributions parameters were developed for different ranges of non-dimensional superficial velocity, defined by the ration of total superficial velocity to the drift velocity.

    Original languageEnglish (US)
    Pages (from-to)528-538
    Number of pages11
    JournalJournal of Fluids Engineering, Transactions of the ASME
    Issue number4
    StatePublished - Jul 1 2004

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering


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