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A High-Fidelity Turbulence Length Scale for Flow Simulation

  • Conference paper
Progress in Hybrid RANS-LES Modelling

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 117))

Abstract

The difference and connection between RANS and LES is briefly discussed. After reviewing the success of several LES models some necessary qualities for modeled length scale are concluded. A new 3D von Karman length scale which leads to SAS models is thus proposed for real-life flow simulation. Its “LES” function is extensively evaluated via the simulation of benchmark isotropic decaying turbulence. This length scale can fully make use of the local mesh and yield satisfactorily fine results even at coarse mesh resolutions, and moreover the results have some sort of unity.

The research is supported by National Natural Science Foundation of China (11002014) and Fan-Zhou Foundation (20110403).

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Author information

Authors and Affiliations

  1. School of propulsion, Beihang University, No.37 Haidian District, Beijing, 100191, P.R. China

    Jing-Lei Xu & Ge Gao

  2. China Academy of Aerospace and Aerodynamics, Beijing, P.R. China

    Ning Hu

Authors
  1. Jing-Lei Xu
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  2. Ning Hu
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  3. Ge Gao
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Corresponding author

Correspondence to Jing-Lei Xu .

Editor information

Editors and Affiliations

  1. , School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China, People's Republic

    Song Fu

  2. Höhenkirchener Str. 19 d, Hohenbrunn, 85662, Germany

    Werner Haase

  3. , Division of Information and, Swedish Defence Research Agency, FOI, Stockholm, SE-164 90, Sweden

    Shia-Hui Peng

  4. Strömungstechnik, Center of Computer Applications in, DLR, Institut für Aerodynamik und, Bunsenstraße 10, Göttingen, 37073, Germany

    Dieter Schwamborn

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© 2012 Springer-Verlag Berlin Heidelberg

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Xu, JL., Hu, N., Gao, G. (2012). A High-Fidelity Turbulence Length Scale for Flow Simulation. In: Fu, S., Haase, W., Peng, SH., Schwamborn, D. (eds) Progress in Hybrid RANS-LES Modelling. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 117. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31818-4_12

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  • DOI: https://doi.org/10.1007/978-3-642-31818-4_12

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-31817-7

  • Online ISBN: 978-3-642-31818-4

  • eBook Packages: EngineeringEngineering (R0)

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