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Consistent Strain/Stress Lag Eddy-Viscosity Model for Hybrid RANS/LES

  • Sylvain LardeauEmail author
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 137)

Abstract

The paper presents a comparison of two hybridization techniques between RANS and LES, and their potential and limitations in an industrial context. The first part of the paper also attempts to address an often eluded problem in the hybrid RANS/LES scommunity: the importance of the baseline statistical model. A new robust low-Reynolds number eddy-viscosity model, derived from a Reynolds-stress model and accounting for the lag between stress and strain is extended to Detached Eddy Simulation (DES), and compared with the most widely used DES model. The potential of a dual-mesh approach, where statistical and scale-resolving simulations are performed on separate grids, with drifts terms allowing to recover the most accurate solution on each grid, is also assessed on a simple case.

Notes

Acknowledgements

The author would like to acknowledge a number of co-workers on those two topics: Dr F. Billard, and Prof. Laurence for the Elliptic-Lag model, R. Tunstall and P. Dawson for the consistent hybrid RANS/LES framework.

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Siemens PLMLondonUK

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