0506 高レイノルズ数におけるチャネル乱流の直接数値計算(OS5-2 壁乱流:統計,構造,動力学の理解,OS5 壁乱流:統計,構造,動力学の理解)

• 清水 雅樹

  阪大

• 荒子 大

  阪大

• 後藤 晋

  阪大

• 河原 源太

  阪大

書誌事項

タイトル別名

• 0506 Direct numerical simulation of turbulent channel flow at high Reynolds number

抄録

Recent works by several groups have pushed direct numerical simulations of turbulent channel flows up to Re_γ ? 4000-5000. However, these values of Re_γ are still insufficient to discuss the multiscale characteristics in a logarithmic layer, and it is necessary to achieve a turbulent state with a wide range of scales. Numerical simulations using polynomial expansions in wall-normal direction often encountered a serious problem caused by their ill-conditioned characteristics. We report here that this problem does not occur by using a appropriate spectral expansions and that we realize turbulent flows at Re_γ up to at 12000.

収録刊行物

• 流体工学部門講演会講演論文集

  流体工学部門講演会講演論文集 2013 (0), _0506-01_-_0506-02_, 2013

  一般社団法人 日本機械学会

キーワード

• wall turbulence
• turbulence structure
• logarithmic layer
• channel flow

詳細情報

• CRID: 1390001205882841216
• NII論文ID: 110009957411
• DOI: 10.1299/jsmefed.2013._0506-01_
• ISSN: 24242896
• Web Site: https://www.jstage.jst.go.jp/article/jsmefed/2013/0/2013__0506-01_/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可