A priori analysis of an isothermal, turbulent two-phase flow

Alessandro Pecenko, Johannes G.M. Kuerten

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


    A novel approach to the simulation of isothermal, turbulent two-phase (liquid/vapour) flow of one substance is presented. The two-phase flow is modeled with a “one-fluid" formulation by means of a diffuse-interface concept and of the frame-invariant Korteweg tensor of capillary stresses at the interface. A single system of compressible Navier-Stokes equations can be written for the whole flow domain, the fluid properties being described by continuous functions of the mass density. The Van der Waals equation of state accounts for the variation of pressure with density at a given value of temperature slightly below the critical isotherm. After description of the numerical method, results of the Direct Numerical Simulation of a classic benchmark problem are shown. Next, two-phase subgrid terms related to the nonlinear pressure and capillary terms are studied by means of an a priori analysis based on DNS results, and a subgrid model for these terms is proposed.
    Original languageUndefined
    Title of host publicationQuality and Reliability of Large-Eddy Simulations II
    EditorsM.V. Salvetti, Bernardus J. Geurts, J. Meyers, P. Sagaut
    Place of PublicationDordrecht
    Number of pages10
    ISBN (Print)978-94-007-0230-1
    Publication statusPublished - 2011
    EventQuality and Reliability of Large-Eddy Simulations II, QLES 2009 - Pisa, Italy
    Duration: 9 Sep 200911 Sep 2009
    Conference number: 2

    Publication series

    NameERCOFAC Series
    ISSN (Print)1382-4309


    WorkshopQuality and Reliability of Large-Eddy Simulations II, QLES 2009
    Abbreviated titleQLES


    • IR-76080
    • EWI-19578
    • METIS-277533

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