CFD4NRS with a focus on experimental and CMFD investigations of bubbly flows

G. Yadigaroglu, M. Simiano, R. Milenkovic, J. Kubasch, M. Milelli, R. Zboray, F. De Cachard, B. Smith, D. Lakehal, B. Sigg

    Research output: Contribution to journalArticlepeer-review

    4 Scopus citations

    Abstract

    The paper discusses first current computational trends related to reactor safety problems and developments needed, as well as the need for new kinds of much more detailed experimental data for the validation of the new methods and codes. The numerous bubbly flow experiments conducted during the last decade at PSI are then reviewed and put in perspective with regards to the needs of the analysts. The latest experiments produced first-of-a-kind sets of experimental data from bubbly plumes and jets. Some of these data were conditionally ensemble or phase averaged to separate the effects of large-scale meandering and oscillations or coherent structures from the time-dependent small-scale effects; then the Reynolds stress terms could be properly identified. The large data sets that have been created can be further mined to extract additional information for the two-phase flow analyst. The companion analytical developments and simulations of bubbly flows with RANS and LES methods are discussed. LES methods are needed to overcome some of the basic limitations of RANS simulations.

    Original languageEnglish (US)
    Pages (from-to)771-785
    Number of pages15
    JournalNuclear Engineering and Design
    Volume238
    Issue number3
    DOIs
    StatePublished - Mar 2008

    All Science Journal Classification (ASJC) codes

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

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