Averaging procedures used to form the Unsteady Reynolds Averaged Navier-Stokes (URANS) and Large Eddy Simulation (LES) equations are outlined. Also, turbulence modelling hierarchies for unsteady flows are presented. These range from URANS to DNS (Direct Numerical Simulation). The grid requirements for different approaches are also discussed. The LES models that are used for results in later chapters are given, along with details of others. Different types of LES filters are outlined. Their potential strong impact on results is discussed. A hierarchy of key elements for industrial LES is proposed. Notably, for flows without transition, the actual explicit LES model comes low down. More the key element is the numerical schemes discussed in Chap. 3. Key hybrid RANS-LES approaches are given. The advantages and disadvantages of these are outlined. The discussion shows that considerable expertise is needed to safely use hybrid RANS-LES techniques. Hence, the need for best practice guidelines is proposed. Methods for generating turbulence inflow are outlined. It is shown that many of these have limited applicability to complex engineering systems and so suitable strategies proposed.


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    Titel :

    Turbulence and Its Modelling


    Weitere Titelangaben:

    Fluid Mechanics, Appl.


    Beteiligte:
    Tucker, P. G. (Autor:in)


    Erscheinungsdatum :

    01.01.2014


    Format / Umfang :

    56 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Current trends in turbulence modelling

    Rodi, W. / Societe de Mathematiques Appliquees et Industrielles / Institut National de Recherche en Informatique et en Automatique | British Library Conference Proceedings | 1993


    Turbulence Modelling for Supersonic Separated Flows

    Shams, A. / Comte, P. | Tema Archiv | 2010


    Turbulence Modelling Options for Airfoil Computations

    Godin, P. / Zingg, D. W. / Canadian Aeronautics and Space Institute; Aerodynamics Section et al. | British Library Conference Proceedings | 1995


    A FUNDAMENTAL APPROACH TO TURBULENCE MODELLING

    Lewis, M. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2012


    Turbulence Closure Modelling in Coastal Waters

    Burchard, Hans / Gräwe, Ulf / Holtermann, Peter et al. | HENRY – Bundesanstalt für Wasserbau (BAW) | 2014

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