A hybrid LES/RANS approach using an anisotropy-resolving algebraic turbulence model

• 安倍, 賢一

  九州大学大学院工学研究院航空宇宙工学部門

抄録

In order to derive a possible path for developing a large eddy simulation (LES) applicable to high Reynolds-number turbulent flows, a hybrid approach connecting LES with the Reynolds-averaged Navier-Stokes (RANS) modeling in the near-wall region is studied. In contrast to most of the previous studies that have employed linear eddy-viscosity models, in this study, an advanced non-linear eddy-viscosity model is introduced to resolve the near-wall stress anisotropy more correctly. To investigate the model performance in detail, the proposed model is applied to fully-developed plane channel flows with various grid resolutions and at various Reynolds numbers. The grid resolution in the streamwise (x) and spanwise (z) directions ranges from 101 to 103 in wall unit (Δx+ or Δz+), while y+wall∼ 1 in the wall-normal(y) direction. The present model provides encouraging results for further development of this kind of hybrid LES/RANS model.

収録刊行物

• International Journal of Heat and Fluid Flow

  International Journal of Heat and Fluid Flow 26 (2), 204-222, 2005-04

  Elsevier

キーワード

• Large Eddy Simulation
• Detached Eddy Simulation
• Hybrid LES/RANS Model
• Non-Linear Eddy-Viscosity Model
• Near-Wall Anisotropy

詳細情報

• CRID: 1050580007680789120
• NII論文ID: 120006952141
• NII書誌ID: AA00234073
• HANDLE: 2324/4150686
• ISSN: 0142727X
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles
  • KAKEN