Large Eddy Simulation (LES) represents nowadays one of the most promising techniques for the evaluation of the dynamics and evolution of turbulent structures characterizing internal combustion engines (ICE). In the present paper, subdivided into two parts, the capabilities of the open-source CFD code OpenFOAM® v2.3.0 are assessed in order to evaluate its suitability for engine cold flow LES analyses. Firstly, the code dissipative attitude is evaluated through an inviscid vortex convection test to ensure that the levels of numerical dissipation are compatible with LES needs. Quality and completeness estimators for LES simulations are then proposed. In particular the Pope M parameter is used as a LES completeness indicator while the LSR parameter provides useful insights far calibrating the grid density. Other parameters such as the two-grid LESIQk index are also discussed. Then advanced SGS models such as the dynamic WALE and the Sigma models are compared with models traditionally used for LES simulations of ICE wall-bounded flows, i.e. the dynamic Smagorinsky and the WALE models. The proposed SGS models have been implemented in the open-source CFD code OpenFOAM®, extending its standard capabilities. Validation of the implemented models has been performed using two different test cases: the Dellenback abrupt expansion, which is presented in part I, and the Thobois stationary flow bench, presented in part II. The results have been evaluated through comparison with experimental data and the completeness of the LES simulations has been assessed using the aforementioned quality estimators.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Assessment of Advanced SGS Models for LES Analysis of ICE Wall-Bounded Flows - Part I: Basic Test Case


    Additional title:

    Sae Int. J. Engines


    Contributors:

    Published in:

    Publication date :

    2016-03-14


    Size :

    17 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Advanced turbulence models for high-Mach number wall bounded flows

    Barber, T. / Choi, D. / Nedungadi, A. et al. | AIAA | 1998


    LES of Compressible Wall-Bounded Flows

    El-Askary, Wageeh / Schroeder, Wolfgang / Meinke, Matthias | AIAA | 2003


    Aeroacoustics of Wall-Bounded Turbulent Flows

    Z. W. Hu / C. L. Morfey / N. D. Sandham | AIAA | 2002


    Aeroacoustics of wall-bounded turbulent flows

    Hu, Z. / Morfey, C. / Sandham, N. | AIAA | 2001


    Near-Wall Behavior of Turbulent Wall-Bounded Flows

    Buschmann, Matthias / Indinger, Thomas / Gad-el-Hak, Mohamed | AIAA | 2008