Local liquid velocity in vertical air-water downward flow

Xiaodong Sun, Sidharth Paranjape, Seungjin Kim, Hiroshi Goda, Mamoru Ishii, Joseph M. Kelly

    Research output: Contribution to journalArticlepeer-review

    8 Scopus citations


    This paper presents an experimental study of local liquid velocity measurement in downward air-water bubbly and slug flows in a 50.8 mm inner-diameter round pipe. The axial liquid velocity and its fluctuations were measured by a laser Doppler anemometry (LDA) system. It was found that the maximum liquid velocity in a downward two-phase flow could occur off the pipe centerline at relatively low liquid flow rates and this observation is consistent with other researchers' results. The comparisons between the liquid flow rates measured by a magnetic flow meter and those obtained from the local LDA and multi-sensor conductivity probe measurements showed good agreement. In addition, based on the local measurements the distribution parameter and the drift velocity in the drift-flux model were obtained for the current downward flow tests.

    Original languageEnglish (US)
    Pages (from-to)539-545
    Number of pages7
    JournalJournal of Fluids Engineering, Transactions of the ASME
    Issue number4
    StatePublished - Jul 2004

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering


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