800 fps neutron radiography of air-water two-phase flow

Robert Zboray, Pavel Trtik

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    We have demonstrated dynamic cold neutron imaging of air-water two-phase flows up to 800 frames per second imaging rates. This has been achieved by using a high-efficiency (relatively thick) scintillator screen in combination with the highest available flux on a continuous spallation source and a high-speed sCMOS camera. This combination renders the spatial resolution to relatively modest value of about 0.5 mm, which is nevertheless sufficient for resolution of bubbles of the size down to about 1.0 mm in motion with unprecedented framerate using neutron imaging. We show the feasibility of the technique on the two-phase flow at ambient temperature and atmospheric pressure conditions, with the foreseen aim of measurements of two phase flows at high-temperatures and high pressures. It is also foreseen that the technique will be further utilized for quantification of the time-resolved instantaneous gas fraction and the gas phase velocity. • Demonstration of up to 800 frames per second dynamic cold neutron radiography.• Application of such technique for non-periodic (transient) process of bubbly flow in water.• Potential for quantification of (i) instantaneous gas volume fraction in dynamic two-phase flow and (ii) instantaneous gas phase velocimetry.

    Original languageEnglish (US)
    Pages (from-to)96-102
    Number of pages7
    JournalMethodsX
    Volume5
    DOIs
    StatePublished - Jan 1 2018

    Fingerprint

    Pneumoradiography
    Neutron radiography
    Neutrons
    Two phase flow
    Gases
    Water
    Air
    Imaging techniques
    Temperature
    Atmospheric Pressure
    Rheology
    Phase velocity
    High speed cameras
    Radiography
    Velocity measurement
    Phosphors
    Atmospheric pressure
    Volume fraction
    Demonstrations
    Fluxes

    All Science Journal Classification (ASJC) codes

    • Clinical Biochemistry
    • Medical Laboratory Technology

    Cite this

    Zboray, Robert ; Trtik, Pavel. / 800 fps neutron radiography of air-water two-phase flow. In: MethodsX. 2018 ; Vol. 5. pp. 96-102.
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    800 fps neutron radiography of air-water two-phase flow. / Zboray, Robert; Trtik, Pavel.

    In: MethodsX, Vol. 5, 01.01.2018, p. 96-102.

    Research output: Contribution to journalArticle

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