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      Image-Processing-Based Study of the Interfacial Behavior of the Countercurrent Gas-Liquid Two-Phase Flow in a Hot Leg of a PWR

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          Abstract

          The interfacial behavior during countercurrent two-phase flow of air-water and steam-water in a model of a PWR hot leg was studied quantitatively using digital image processing of a subsequent recorded video images of the experimental series obtained from the TOPFLOW facility, Helmholtz-Zentrum Dresden-Rossendorf e.V.(HZDR), Dresden, Germany. The developed image processing technique provides the transient data of water level inside the hot leg channel up to flooding condition. In this technique, the filters such as median and Gaussian were used to eliminate the drops and the bubbles from the interface and the wall of the test section. A Statistical treatment (average, standard deviation, and probability distribution function (PDF)) of the obtained water level data was carried out also to identify the flow behaviors. The obtained data are characterized by a high resolution in space and time, which makes them suitable for the development and validation of CFD-grade closure models, for example, for two-fluid model. This information is essential also for the development of mechanistic modeling on the relating phenomenon. It was clarified that the local water level at the crest of the hydraulic jump is strongly affected by the liquid properties.

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          Most cited references9

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          Study of countercurrent flow limitation in a horizontal pipe connected to an inclined one

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            Scale effects on countercurrent gas-liquid flow in a horizontal tube connected to an inclined riser

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              Countercurrent gas-liquid annular flow including the flooding state

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                Author and article information

                Journal
                Science and Technology of Nuclear Installations
                Science and Technology of Nuclear Installations
                Hindawi Limited
                1687-6075
                1687-6083
                2012
                2012
                : 2012
                :
                : 1-10
                Article
                10.1155/2012/209542
                53634b4e-4219-40e6-80fd-f54d24918374
                © 2012

                http://creativecommons.org/licenses/by/3.0/

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