CHACTERISTICS OF FLOW FIELD ASSOCIATED WITH SUCTION OPERATION OF LONGITUDINAL RIDGE ELEMENT INSTALLED ON BOTTOM WALL OF OPEN CHANNEL
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- WATANABE Katsutoshi
- 徳山工業高等専門学校 土木建築工学科
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- KITAGAWA Yoshitaka
- 徳山工業高等専門学校専攻科 環境建設工学専攻
Bibliographic Information
- Other Title
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- 開水路底面に設置した縦桟粗度の吸い込み操作に伴う流れ場の特徴
Abstract
<p> In this study, the characteristics of the flow field associated with the suction operation of the longitudinal ridge element in an open channel with the longitudinal ridge element installed on the bottom wall were investigated by flow velocity measurement and flow visualization. From the flow velocity measurement results, it was clarified that the remarkable upward flow and paired swirling flow disappeared by the suction operation, and the primary velocity distribution on the longitudinal ridge element became uniform in the transverse direction. In addition, the horizontal Reynolds stress (-uw) is reduced by the suction operation, and the positive and negative phases of the distribution are reversed. Furthermore, in the horizontal turbulence energy generation term (-uw(dU/dy)) distribution, it was clarified that a suction operation produces a negative value on the longitudinal ridge element. It is speculated that the characteristics of the above flow velocity measurement results are caused by the intermittent and small-scale longutudinal vortex structure on the longitudinal ridge element due to the suction operation.</p>
Journal
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- Japanese Journal of JSCE
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Japanese Journal of JSCE 80 (16), n/a-, 2024
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390580793828434432
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- ISSN
- 24366021
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed