On the formulation of the dynamic mixed subgrid-scale model

Bert Vreman, Bernard Geurts, Hans Kuerten

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    Abstract

    The dynamic mixed subgrid‐scale model of Zang et al. [Phys. Fluids A 5, 3186 (1993)] (DMM1) is modified with respect to the incorporation of the similarity model in order to remove a mathematical inconsistency. Compared to DMM1, the magnitude of the dynamic model coefficient of the modified model (DMM2) is increased considerably, while it is still significantly smaller than as occurs in the dynamic subgrid‐scale eddy‐viscosity model of Germano [J. Fluid Mech. 238, 325 (1992)] (DSM). Large eddy simulations(LES) for the weakly compressible mixing layer are conducted using these three models and results are compared with direct numerical simulation (DNS) data. LES based on DMM1 gives a significant improvement over LES using DSM, while even better agreement is achieved with DMM2.
    Original languageEnglish
    Pages (from-to)4057-4059
    Number of pages3
    JournalPhysics of fluids
    Volume6
    Issue number12
    DOIs
    Publication statusPublished - 1994

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