乱流境界層の直接数値シミュレーションにおけるヘアピン渦構造の力学(乱流(1),一般講演)

• 石原,卓

  名大院工

• 加藤,雅之

  名大院工

• 金田,行雄

  名大院工

書誌事項

タイトル別名

• Dynamics of hairpin vortex structures in direct numerical simulation of turbulent boundary layer

抄録

We performed spectral direct numerical simulations (DNSs) of zero-pressure-gradient turbulent boundary layer (TBL) over a flat plate using a fringe region. In the DNS with 4608×512×768 grid points, we attained R_θ=835～2443 outside the fringe region. Here R_θ is the Reynolds number based on the momentum thickness. A short log-law-like region was observed for R_θ>2000 in the flow field of the TBL. Visualizations of the TBL flow fields suggest that coalescence of the same-signed cane-type neighbor vortices is one of the typical mechanisms of the growth of the hairpin-like vortex packets in the log-law region of the TBL.

収録刊行物

• 日本流体力学会年会講演論文集

  日本流体力学会年会講演論文集 2010 117-, 2010-09-09

  日本流体力学会

詳細情報

• CRID: 1540009770402499712
• NII論文ID: 110008460105
• NII書誌ID: AA11567941
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10924139
• 本文言語コード: ja
• データソース種別:
  • NDL-Digital
  • CiNii Articles