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Scale-Resolving Simulations of Wall-Bounded Flows with an Unstructured Compressible Flow Solver

  • Axel ProbstEmail author
  • Silvia Reuß
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 130)

Abstract

The fully-developed channel flow at \(Re_\tau \approx 395\) is used to validate scale-resolving simulations with the unstructured compressible DLR-TAU code. In a sensitivity study based on wall-resolved LES a low-dissipative spatial scheme is derived, which allows to predict the channel flow in fair agreement with DNS. Then the scheme is used in Improved Delayed DES computations in order to assess TAU’s capabilities for wall-modelled LES. As pointed out in a grid study, a tangential resolution of about \(\varDelta x^+ \approx 40\), \(\varDelta z^+ \approx 20\) is required to obtain acceptable mean-flow results. Besides, the combination of IDDES with a vorticity-dependent subgrid filter width is shown to yield consistent results, and the effect of the underlying RANS approach up to Reynolds-stress modelling is analysed.

Keywords

Plane Channel Flow Compressible Flux Compressible Flow Solver Convective Time Unit Basic Numerical Study 
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 International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.DLR (German Aerospace Center)GöttingenGermany

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