Production and transport of turbulent helicity in turbulent channel flow with wall-normal system rotation

• HORIE Maito

  東京大学大学院　理学系研究科

• HAMBA Fujihiro

  東京大学生産技術研究所　基礎系部門

Bibliographic Information

Other Title

• 壁垂直軸周りの回転を与えたチャネル乱流における乱流ヘリシティの生成と輸送
• カベ スイチョクジク マワリ ノ カイテン オ アタエタ チャネル ランリュウ ニ オケル ランリュウ ヘリシティ ノ セイセイ ト ユソウ

Abstract

Turbulent helicity is known to be generated in the boundary layer when the system is rotated perpendicular to the wall. In order to consider the production and transport mechanism, we used LES of wall-normal rotating turbulent channel flow to investigate the contribution of each term in the budgets of the turbulent helicity and its three parts h_xx, h_yy and h_zz. We found that the pressure-diffusion term had the most contribution to the generation of the turbulent helicity throughout the whole region when the rotation parameter was as small as 0.01-0.02. However, if we decompose the turbulent helicity into three terms, the contribution of the production term is the largest in the budgets of h_xx and h_zz, which are superior to h_yy.

Journal

• SEISAN KENKYU

  SEISAN KENKYU 73 (1), 17-21, 2021-01-01

  Institute of Industrial Science The University of Tokyo

Details

• CRID: 1390287142242676096
• NII Article ID: 130007986047
• NII Book ID: AN00127075
• DOI: 10.11188/seisankenkyu.73.17
• ISSN: 18812058
• ISSN: 0037105X
• NDL BIB ID: 031269263
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I031269263
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed