High-order numerical methods for unstructured grids combine the superior accuracy of high-order spectral or finite difference methods with the geometric flexibility of low-order finite volume or finite element schemes. Over the past few years, they have shown promise in enabling implicit large-eddy simulations within the vicinity of complex geometrical configurations. However, the cost of such simulations remains prohibitive. In this paper, the impact of number representation on the efficiency and efficacy of these methods is considered. Theoretical performance models are derived and assessed. Specifically, four test cases are considered: 1) the viscous Taylor–Green vortex, 2) flow over a circular cylinder, 3) flow through a T106c low-pressure turbine cascade, and 4) flow around a NACA 0021 in deep stall. It is found that the use of single (in lieu of double) precision arithmetic does not have a significant impact on accuracy. The performance of the resulting simulations was found to improve between 1.4 and 2.9 times.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Impact of Number Representation for High-Order Implicit Large-Eddy Simulations


    Beteiligte:
    Witherden, F. D. (Autor:in) / Jameson, A. (Autor:in)

    Erschienen in:

    AIAA Journal ; 58 , 1 ; 184-197


    Erscheinungsdatum :

    01.01.2020




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Implicit Large Eddy Simulations Using a High-Order Overset Grid Solver

    Sherer, S. E. / Visbal, M. R. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2004



    High-Order Implicit Large-Eddy Simulations of Flow over a NACA0021 Aerofoil

    Park, J. S. / Witherden, F. D. / Vincent, P. E. | AIAA | 2017

    Freier Zugriff

    High-Order Implicit Large-Eddy Simulations of Supersonic Corner Flow (AIAA 2014-0588)

    Bisek, N.J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2014


    Higher-Order Implicit Large Eddy Simulations of a VFE-2 Delta Wing

    Dzanic, Tarik / Martinelli, Luigi | AIAA | 2019