A new simple h-mesh adaptation algorithm for standard Smagorinsky LES: A first step of Taylor scale as a refinement variable

Sayan Kaennakham, Arne Holdø, Caroline Lambert

    Research output: Contribution to journalArticle

    2 Citations (Scopus)
    8 Downloads (Pure)

    Abstract

    The interaction between discretization error and modeling error has led to some doubts in adopting Solution Adaptive Grid (SAG) strategies with LES. Existing SAG approaches contain undesired aspects making the use of one complicated and less convenient to apply to real engineering applications. In this work, a new refinement algorithm is proposed aiming to enhance the efficiency of SAG methodology in terms of simplicity in defining, less user's judgment, designed especially for standard Smagorinsky LES and computational affordability. The construction of a new refinement variable as a function of the Taylor scale, corresponding to the kinetic energy balance requirement of the Smagorinsky SGS model is presented. The numerical study has been tested out with a turbulent plane jet in two dimensions. It is found that the result quality can be effectively improved as well as a significant reduction in CPU time compared to fixed grid cases.

    Original languageEnglish
    Pages (from-to)33-50
    Number of pages18
    JournalInternational Journal of Multiphysics
    Volume4
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2010

    Fingerprint

    Mesh Adaptation
    Adaptive Grid
    Refinement
    Energy balance
    Kinetic energy
    Program processors
    Modeling Error
    Discretization Error
    Energy Balance
    CPU Time
    Engineering Application
    Numerical Study
    Simplicity
    Two Dimensions
    Grid
    Methodology
    Requirements
    Interaction
    Standards
    Model

    Bibliographical note

    Article published under Creative Commons Attribution License (CC-BY 4.0).

    Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

    ASJC Scopus subject areas

    • Computational Mechanics
    • Numerical Analysis
    • Modelling and Simulation
    • Mechanics of Materials
    • Fluid Flow and Transfer Processes

    Cite this

    A new simple h-mesh adaptation algorithm for standard Smagorinsky LES : A first step of Taylor scale as a refinement variable. / Kaennakham, Sayan; Holdø, Arne; Lambert, Caroline.

    In: International Journal of Multiphysics, Vol. 4, No. 1, 01.01.2010, p. 33-50.

    Research output: Contribution to journalArticle

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