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A Hybrid RANS/LES Calculation of Turbulent Channel Flow

  • Fujihiro Hamba
Conference paper

Abstract

LES of wall-bounded flows with the no-slip boundary conditions is limited to moderate Reynolds numbers; wall modeling is necessary for high-Reynolds-number flows. One of approaches to better wall modeling is the hybrid RANS/LES modeling. In this study a hybrid modeling is applied to a channel flow calculation; the k-ε RANS model is used near the wall whereas the one-equation subgrid-scale model is adopted for the LES away from the wall. A mismatch of the mean velocity profile appears between the RANS and LES regions. To improve the velocity profile two values of the velocity component are defined at the boundary between the two regions. As a result the mismatch is removed and better velocity profiles are obtained.

Keywords

Velocity Profile Large Eddy Simulation Reynolds Stress Eddy Viscosity Reynolds Shear Stress 
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.

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Copyright information

© Springer Japan 2003

Authors and Affiliations

  • Fujihiro Hamba
    • 1
  1. 1.Institute of Industrial ScienceUniversity of TokyoMeguro-ku, TokyoJapan

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