Mesh Node Distribution in Terms of Wall Distance for Large-eddy Simulation of Wall-bounded Flows

  • Thibault Dairay
  • Eric Lamballais
  • Sofiane Benhamadouche
Article

Abstract

In this note, basic turbulent statistics in a pipe flow are computed accurately by large-eddy simulation using a mesh resolution coarser than the viscous sublayer. These results are obtained when a regular Cartesian mesh is used for the spatial discretization of the circular pipe thanks to an immersed boundary method combined with high-order schemes. In this particular computational configuration, the near-wall features of mean velocity and Reynolds stress profiles are found to be correctly captured at a scale significantly smaller than the mesh size. Comparisons between channel and pipe flow configurations suggest that an irregular mesh distribution in terms of wall distance may be a favourable condition to explicitly compute by large-eddy simulation reliable wall turbulence without any extra-modelling in the near-wall region.

Keywords

Large-eddy simulation Turbulent pipe flow Immersed boundary method High-order schemes Computational mesh resolution 

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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  1. 1.PPRIME InstituteIncompressible Turbulence and Control Group - Université de Poitiers, CNRS, ISAE-ENSMAFuturoscope Chasseneuil CedexFrance
  2. 2.EDF R&D, Fluid MechanicsEnergy and Environment Department 6 Quai WattierChatouFrance

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