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Investigation of Resolution Requirements for Wall-Modelled LES of Attached and Massively Separated Flows at High Reynolds Numbers

  • Xiaoqin Zhang
  • Tobias Knopp
  • Mariafrancesca Valentino
  • Roland Kessler
  • Gert Lube
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 112)

Summary

This work is dedicated to the resolution requirements of Large-Eddy Simulation (LES) with near-wall modelling for attached and massively separated flows at high Reynolds numbers using the DLR THETA code. Two sensors are proposed to measure the resolution quality of LES for statistically steady flows. The first sensor is based on the resolved turbulent kinetic energy and the second one considers the resolved turbulent shear stress. These sensors are applied to turbulent channel flow at Re τ = 4800 and to the flow over a backward-facing step at Re h = 37500 on successively refined meshes, and results are compared with a convergence study of the mean velocity profiles.

Keywords

Turbulent Kinetic Energy Subgrid Scale Turbulent Channel Flow Smagorinsky Model Resolution Requirement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Xiaoqin Zhang
    • 1
  • Tobias Knopp
    • 2
  • Mariafrancesca Valentino
    • 2
  • Roland Kessler
    • 2
  • Gert Lube
    • 3
  1. 1.School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingapore
  2. 2.DLR Göttingen, AS-C2A2S2EGöttingenGermany
  3. 3.Institut für Numerische und Angewandte MathematikGeorg-August-Universität GöttingenGöttingenGermany

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