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A RANS Assisted LES Approach

  • A. AbbàEmail author
  • M. Germano
  • M. Nini
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 25)

Abstract

In the particular approach herein proposed, RANS and LES are combined in order to achieve a detailed description of turbulent flows without incurring in infeasible computational effort. This model is based on the hybrid filter approach proposed by Germano [5]. One of the most interesting point of this approach, is that the equations obtained by filtering Navier–Stokes equations, already include terms which are able to represent the interactions between RANS and LES regions. Therefore no further artificial terms are needed to allow the appropriate energy and momentum transfer between RANS and LES. This approach has already been tested  [8, 10] showing promising results.

Notes

Acknowledgements

The presented numerical results have been obtained with the computational resources provided by CINECA (Italy) and NIIF (Hungary), respectively within the high performance computing projects ISCRA-C LES-DiG and DECI-11 HyDiG.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Aerospace Science and TechnologyPolitecnico di MilanoMilanItaly
  2. 2.Department of Civil and Environmental EngineeringDuke UniversityDurhamUSA

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