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Measuring liquid film thickness in annular two-phase flows by cold neutron imaging

Zboray, R. ; Prasser, H.-M

In: Experiments in Fluids, 2013, vol. 54, no. 9, p. 1-15

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    Titre
    • Measuring liquid film thickness in annular two-phase flows by cold neutron imaging
    Auteur
    • Zboray, R.. Laboratory for Thermal-hydraulics, Nuclear Energy and Safety Department, Paul Scherrer Institute, 5232, Villigen, Switzerland
    • Prasser, H.-M. Laboratory for Thermal-hydraulics, Nuclear Energy and Safety Department, Paul Scherrer Institute, 5232, Villigen, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Experiments in Fluids, 2013, vol. 54, no. 9, p. 1-15. Springer Berlin Heidelberg
    Autre version électronique
    Classification
    • Technologie, Sciences de l'ingénieur
    Identifiant OAI-PMH
    • oai:doc.rero.ch:311163
    Summary
    An overview of a measurement method for liquid film thickness in annular flows based on cold neutron imaging is given here. Neutron imaging being a non-intrusive, contactless method is attractive option for two-phase flow investigations offering an excellent contrast. It can provide with information at a high spatial resolution on the flow structure, like the thickness of the liquid film in annular flows. The method has been optimized, and its performance, regarding bias, statistical accuracy, upper and lower detection limits, has been thoroughly quantified using computational tools and measurement results. The technique has been developed based on nuclear fuel bundle models; however, it is applicable practically to annular flows in any arbitrary flow channel geometry of interest