Characteristics of Low-Speed Streaks in the Flow of Drag-Reducing Surfactant Solution.
書誌事項
- タイトル別名
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- Characteristics of Low-Speed Streaks in
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The characteristics of low-speed streaks in the turbulent channel flow of a drag-reducing surfactant solution are studied by employing the hydrogen-bubble flow visualization method. The mean velocity profiles and the distributions of streamwise turbulence intensity are also obtained. It is shown that, at a large drag reduction rate DR, the profile of the streamwise turbulence intensity has a plateau region around its peak. In the drag-reducing flow, the mean spanwise streak spacing reaches minimum at some distance from the wall. In the drag-reducing flow of high-density(1000 ppm)surfactant solution, the low-speed streaks appear intermittently at the Reynolds number smaller than those for the 'hump' of the f-Re curve(f:friction factor). The mean spanwise streak spacing very near the wall increases as DR becomes large. It is speculated that the nondimensional wall-normal distance y+ of the center of streamwise vortices is larger for the flow of large DR compared with that for the Newtonian fluid flow.
収録刊行物
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- JSME International Journal Series B Fluids and Thermal Engineering
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JSME International Journal Series B Fluids and Thermal Engineering 40 (4), 550-557, 1997
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204671326848
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- NII論文ID
- 130004003653
- 110002981486
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- NII書誌ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 4346338
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
