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On the Resolution of Mean Skin Friction by Hybrid RANS/LES Simulations at High Reynolds Numbers

  • N. RenardEmail author
  • S. Deck
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 25)

Abstract

This study addresses the following question: how much do the RANS model and the LES-resolved fluctuations contribute to mean skin friction when a Wall-Modelled LES is performed by means of a hybrid RANS/LES strategy (RANS near-wall modelling, LES outer layer resolution)? The paper relies on both Wall-Resolved and Wall-Modelled LES obtained by means of the Zonal Detached Eddy Simulation technique, together with very high Reynolds number predictions provided by RANS boundary layer simulations. A scale decomposition is performed by applying a spectral analysis to a recent physical decomposition of mean skin friction involving the production term of turbulent kinetic energy. The results suggest that half of mean skin friction may be resolved by some hybrid RANS/LES methods used as WMLES at very high Reynolds numbers.

Notes

Acknowledgements

The authors wish to thank all the people involved in the past and present evolution of the FLU3M code. Romain Laraufie and Pierre-Élie Weiss are warmly acknowledged for very stimulating discussions. The WRLES computation was made thanks to the HPC resources from GENCI-CINES (Project ZDESWALLTURB, Grant 2012-[c2012026817]).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.ONERA The French Aerospace LabMeudonFrance

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