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Attached and Detached Eddy Simulation Read chapter Read first chapter

2018 | OriginalPaper | Chapter

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

Author : Sylvain Lardeau

Published in: Progress in Hybrid RANS-LES Modelling

Publisher: Springer International Publishing

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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.

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previous chapter Stress-Blended Eddy Simulation (SBES)—A New Paradigm in Hybrid RANS-LES Modeling
next chapter Improved Delayed Detached-Eddy Simulations of Actively Controlled Flow
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Metadata
Title
Consistent Strain/Stress Lag Eddy-Viscosity Model for Hybrid RANS/LES
Author
Sylvain Lardeau
Copyright Year
2018
Book
Progress in Hybrid RANS-LES Modelling

Print ISBN: 978-3-319-70030-4

Electronic ISBN: 978-3-319-70031-1

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-70031-1_4

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