ALE手法を用いた運動する車両周りの非圧縮性LES解析 : 第1報,基本的な流れ場における離散化手法の比較検討(流体工学,流体機械)

• 稲垣 昌英

  (株)豊田中央研究所

• 佐藤 範和

  (株)豊田中央研究所

書誌事項

タイトル別名

• LES Analysis of Incompressible Flows around an Automobile in Motion Using ALE Method : 1st Report, Comparative Study on Discretization Methods with Moving and Transformed Grids in Basic Flows(Fluids Engineering)
• ALE手法を用いた運動する車両周りの非圧縮性LES解析(第1報)基本的な流れ場における離散化手法の比較検討
• ALE シュホウ オ モチイタ ウンドウ スル シャリョウ マワリ ノ ヒアッシュクセイ LES カイセキ ダイ1ポウ キホンテキ ナ ナガレバ ニ オケル リサンカ シュホウ ノ ヒカク ケントウ

抄録

Our objective is to perform Large Eddy Simulation (LES) of incompressible flows around an automobile with motion using arbitrary Lagrangian-Eulerian (ALE) method without decrease in accuracy. For LES of incompressible flows, the discretization method that conserves not only the mass and momentum but also the kinetic energy is preferable, because such conservation properties enable us to conduct computations without any numerical viscosity. We consider a discretization method as a suitable one to LES using ALE method, which is based on colocated grids, and Crank-Nicolson method is employed for the time advancement. Although it dose not fully conserve the kinetic energy discretely, the error is estimated O (Δt^2), which is expected to be insignificant. On the other hand, we also constructed a fully conservative method of kinetic energy on colocated grids, following the quadratic conservative schemes proposed by Morinishi. Moreover, it is clarified that the conservation properties of the other conventional methods are inferior to the two methods mentioned above. The methods are examined in uniform flow and channel flow calculations with moving and transformed grids. The computational results reveal that both two methods mentioned above give similar results. In addition, the obtained results are better than those with other conventinal methods, where the conservation properties somewhat worsen by using Adams-Bashforth method for the time advancement or using the convection velocity vector that does not fully satisfy the divergence-free condition. The present two methods are expected to make it possible to perform LES using ALE method without any numerical viscosity.

収録刊行物

• 日本機械学会論文集Ｂ編

  日本機械学会論文集Ｂ編 76 (764), 546-554, 2010

  一般社団法人 日本機械学会

キーワード

• Computational Fluid Dynamics
• Moving Boundary Problem
• Large Eddy Simulation
• ALE Method
• Colocated Grids
• Conservation Property
• Plane Channel Flow

詳細情報

• CRID: 1390001206296194176
• NII論文ID: 110007593724
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.76.764_546
• ISSN: 18848346
• ISSN: 03875016
• ISSN: http://id.crossref.org/issn/03875016
• NDL書誌ID: 10684730
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10684730
• Web Site: https://www.jstage.jst.go.jp/article/kikaib1979/76/764/76_KJ00006254094/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可