Tridimensional core transient analysis methods (TRICOT): The porous medium model PORFLO for 3D two-phase flow and its application to BWR fuel bundle simulations

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    Abstract

    This presentation describes the current status of the PORFLO code and the latest developments made in the second subtask of the SAFIR2010/TRICOT project. The present work is a continuation of the corresponding previous SAFIR project. In PORFLO, the basic features of the computer code include assumption of porous medium, description of the problem in Cartesian coordinates and the use of either the five-equation model (with a mixture momentum conservation equation) or the six-equation model for the solution of the two-phase flow problem. The most important development steps made during 2008 were: the implementation of the six-equation model to PORFLO and the development of new iterative solvers and preconditioning methods for the solution of the pressure correction equations of both the five-equation SIMPLE algorithm and the newly developed (six-equation) Phase-Coupled SIMPLE algorithm. As a result of the new iterative solvers and preconditioning methods the computation time has been reduced almost by an order of magnitude.
    Original languageEnglish
    Title of host publicationSAFIR2010: The Finnish Research Programme on Nuclear Power Plant Safety 2007-2010
    Subtitle of host publicationInterim Report
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages131-141
    ISBN (Electronic)978-951-38-7267-0
    ISBN (Print)978-951-38-7266-3
    Publication statusPublished - 2009
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Tiedotteita - Research Notes
    Number2466
    ISSN1235-0605

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