### Abstract

Large Eddy Simulation (LES) of high-Reynolds-number wall-bounded turbulent flows is prohibitively expensive if the energy-containing eddies in the near-wall region are resolved. This motivates the use of wall-layer models in which an approximate solution of the near wall dynamics is bridged to an LES of the outer flow. The main interest of the present work are wall-modeling strategies based on Detached Eddy Simulation (DES). In these approaches, the near-wall solution is closed using a Reynolds-averaged Navier Stokes model with a subgrid closure applied to the outer flow. As is well known, the original DES formulation applied directly as a wall model results in a shift in the velocity profile, corresponding to an under-estimation of the skin friction. A new formulation is proposed in this contribution in which the wall-parallel components of the modeled stress are reduced in order to lower the influence of the model and increase the resolved stress. The effectiveness of the new model is evaluated via comparison against DES predictions using the original and recently-proposed versions of the method. The effect of grid resolution and model parameters are also assessed using computations of turbulent channel flow at a Reynolds number based on friction velocity and channel halfwidth of 5000. The predictions show that the anisotropic form of the model stress yields an improved prediction of the mean velocity profile in better agreement with the logarithmic law and with larger resolved stress in the near-wall region.

Original language | English (US) |
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Title of host publication | 2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 |

Pages | 1359-1366 |

Number of pages | 8 |

Edition | PART B |

DOIs | |

State | Published - Dec 1 2007 |

Event | 2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 - San Diego, CA, United States Duration: Jul 30 2007 → Aug 2 2007 |

### Publication series

Name | 2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 |
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Number | PART B |

Volume | 1 SYMPOSIA |

### Other

Other | 2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 |
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Country | United States |

City | San Diego, CA |

Period | 7/30/07 → 8/2/07 |

### ASJC Scopus subject areas

- Mechanical Engineering
- Condensed Matter Physics

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## Cite this

*2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007*(PART B ed., pp. 1359-1366). (2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007; Vol. 1 SYMPOSIA, No. PART B). https://doi.org/10.1115/FEDSM2007-37318