Three-field countercurrent flow limitation model

Jeffrey W. Lane, David L. Aumiller, Lawrence E. Hochreiter, Fan-bill B. Cheung

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    A three-field countercurrent flow limitation (CCFL) model based on the classic flooding curve methodology has been developed and successfully demonstrated in a derivative of the COBRA-TF code. The various physical mechanisms (wave reversal, liquid bridging, and wave interfacial instability) supposed to govern the flooding and flow reversal phenomena are extremely complex and geometric dependent. As a result universally applicable numerical models for these phenomena are not currently available. The chosen approach provides flexibility and leverages the available experimental data to improve the predictive capability of the code. The model is an extension of the standard two-field (liquid-vapor) CCFL model to a three-field (liquid films, vapor, and liquid droplets) CCFL model. This extension includes providing the appropriate set of momentum equations, definitions of required superficial velocities, and new entrainment rate correlations based on CCFL conditions. Necessary criteria to enter and exit the model in a numerically stable manner are also described. The implementation of the model was verified and was shown to provide increased numerical stability in the code predictions. Improvement in the code-to-data agreement of the allowable downward liquid penetration rate for the Dukler and Smith experiments is also demonstrated.

    Original languageEnglish (US)
    Pages (from-to)176-187
    Number of pages12
    JournalNuclear Technology
    Volume177
    Issue number2
    DOIs
    StatePublished - Jan 1 2012

    Fingerprint

    Flow fields
    flow distribution
    liquids
    Liquids
    Vapors
    vapors
    Convergence of numerical methods
    Liquid films
    numerical stability
    entrainment
    Numerical models
    Momentum
    flexibility
    Derivatives
    penetration
    methodology
    momentum
    curves
    predictions
    Experiments

    All Science Journal Classification (ASJC) codes

    • Nuclear and High Energy Physics
    • Nuclear Energy and Engineering
    • Condensed Matter Physics

    Cite this

    Lane, Jeffrey W. ; Aumiller, David L. ; Hochreiter, Lawrence E. ; Cheung, Fan-bill B. / Three-field countercurrent flow limitation model. In: Nuclear Technology. 2012 ; Vol. 177, No. 2. pp. 176-187.
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    Lane, JW, Aumiller, DL, Hochreiter, LE & Cheung, FB 2012, 'Three-field countercurrent flow limitation model', Nuclear Technology, vol. 177, no. 2, pp. 176-187. https://doi.org/10.13182/NT12-A13364

    Three-field countercurrent flow limitation model. / Lane, Jeffrey W.; Aumiller, David L.; Hochreiter, Lawrence E.; Cheung, Fan-bill B.

    In: Nuclear Technology, Vol. 177, No. 2, 01.01.2012, p. 176-187.

    Research output: Contribution to journalArticle

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