A simple adjustment is proposed that improves the predictions of the standard k-? turbulence model in the presence of two-dimensional recirculating flow. An eddy Reynolds number calculated from velocity, vorticity, and eddy viscosity is introduced as a scaling parameter for reducing the decay term in the governing equation for the turbulence-energy dissipation rate. Using the adjusted k-? model to compute the flow past a backstep (channel expansion), the STEMR finite-difference code gives better predictions for streamlines, velocities, and turbulence energies than it does with the standard k-? model. Computed reattachment lengths compare well with experimental data for channel expansion ratios between 1 and 2.


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    Titel :

    A Turbulence Model for Recirculating Flow



    Erschienen in:

    Erscheinungsdatum :

    1991


    Format / Umfang :

    1642190


    Medientyp :

    Report


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :


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