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Analysis of a Hybrid RANS/LES Model Using RANS Reconstruction

  • M. Nini
  • A. Abbà
  • M. Germano
  • M. Restelli
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 165)

Abstract

The Hybrid RANS/LES method proposed is based on the hybrid filter approach introduced by Germano in 2004. In this work, instead of using two explicit models respectively for LES and RANS, we use only a model for LES and we reconstruct the RANS field exploiting the properties of hybrid filter. The reconstruction is obtained from the resolved velocity and the LES subgrid stress tensor. The model has been implemented using a variational approach in a DG-FEM framework and tested for the turbulent channel flow test case. Different configurations for hybrid terms have been compared with DNS data and with pure LES results.

Keywords

Turbulent Channel Flow Detach Eddy Simulation Hybrid Filter Reynolds Stress Tensor Incompressible Case 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We acknowledge that the results of this research have been achieved using the PRACE Research Infrastructure resource provided by NIIF (Hungary), within the project DECI-11 HyDiG.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Dip. di Scienze e Tecnologie AerospazialiPolitecnico di MilanoMilanItaly
  2. 2.Department of Civil and Environmental EngineeringDuke UniversityDurhamUSA
  3. 3.Numerische Methoden in der PlasmaphysikMax-Planck-Institut für PlasmaphysikMunichGermany

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