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Numerical studies towards practical large-eddy simulation

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Abstract

Large-eddy simulation developments and validations are presented for an improved simulation of turbulent internal flows. Numerical methods are proposed according to two competing criteria: numerical qualities (precision and spectral characteristics), and adaptability to complex configurations. First, methods are tested on academic test-cases, in order to abridge with fundamental studies. Consistent results are obtained using adaptable finite volume method, with higher order advection fluxes, implicit grid filtering and “low-cost” shear-improved Smagorinsky model. This analysis particularly focuses on mean flow, fluctuations, two-point correlations and spectra. Moreover, it is shown that exponential averaging is a promising tool for LES implementation in complex geometry with deterministic unsteadiness. Finally, adaptability of the method is demonstrated by application to a configuration representative of blade-tip clearance flow in a turbomachine.

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Authors and Affiliations

  1. LMFA, Université de Lyon - Ecole Centrale de Lyon - Université Lyon 1 - INSA Lyon - UMR CNRS 5509, 36 avenue Guy de Collongue, 69134, Ecully Cedex, France

    J. Boudet, J. Caro & L. Shao

  2. Laboratoire de Physique, Université de Lyon - Ecole Normale Supérieure de Lyon - UMR CNRS 5672, 46 allée d’Italie, 69364, Lyon Cedex 07, France

    E. Lévêque

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  1. J. Boudet
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  2. J. Caro
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  3. L. Shao
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  4. E. Lévêque
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Boudet, J., Caro, J., Shao, L. et al. Numerical studies towards practical large-eddy simulation. J. Therm. Sci. 16, 328–336 (2007). https://doi.org/10.1007/s11630-007-0328-3

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  • DOI: https://doi.org/10.1007/s11630-007-0328-3

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