1014 安定温度成層下における水平正方形ダクトの乱流パフ構造(OS10 渦流れのダイナミクス,オーガナイズドセッション)

• 大槻 赳之

  阪大

• 河原 源太

  阪大

• ウルマンマルクス

  Karlsruhe Institute of Technology

• ピネリアルフレド

  CIEMAT

書誌事項

タイトル別名

• 1014 Structures of a turbulent puff in stably-stratified horizontal square-duct flow

抄録

Direct numerical simulations of streamwise-localized turbulent flow(turbulent puff) in a horizontal square duct heated from above are performed at Richardson numbers 0≦R_i≦0.25 to characterize differences between isothermal and non-isothermal puffs.It is found that the structure of the non-isothermal puff exhibits significantlly different properties from that of the isothermal puff.In particular,differences are observed in wall shear stresses.In the upstream part of the non-isothermal puff higher shear appears on the horizontal walls than the vertical ones.The higher shear on the horizontal walls in the upstream part is interpreted in terms of coherent streamwise vortices induced by buoyancy in the corner regions.

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 2012 (0), 399-400, 2012

  一般社団法人 日本機械学会

キーワード

• DNS
• turbulent puff
• stable temperature stratification
• square duct

詳細情報

• CRID: 1390001205883893888
• NII論文ID: 110009951746
• DOI: 10.1299/jsmefed.2012.399
• ISSN: 24242896
• Web Site: https://www.jstage.jst.go.jp/article/jsmefed/2012/0/2012_399/_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