ORGANIZED HORIZONTAL VORTICES AND LATERAL SEDIMENT TRANSPORT IN COMPOUND OPEN CHANNEL FLOWS
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- IKEDA Syunsuke
- 東京工業大学 工学部土木工学科
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- SANO Takayuki
- JAPAN SOCIETY OF CIVIL ENGINEERS
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- FUKUMOTO Masatake
- JAPAN SOCIETY OF CIVIL ENGINEERS
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- KAWAMURA Kazuhiro
- JAPAN SOCIETY OF CIVIL ENGINEERS
Bibliographic Information
- Other Title
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- 複断面開水路に生じる大規模組織渦と浮遊砂輸送
- フクダンメンカイスイロ ニ ショウジル ダイキボ ソシキウズ ト フユウ サ ユソウ
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Abstract
It has been known that the shear instability generates large horizontal vortices at the junctions of main channel and flood plains for two-stage channels. The present laboratory tests show that the horizontal vortices appear for flow with small relative depth. For channels with bank vegetation, horizontal periodic vortices also appear for small relative depth, and it was seen that the vortices in the main channel is predominant.<br>Numerical computations were performed by employing SDS-2DH turbulence model, and the results obtained agree reasonably well with the experiments. The model can predict the wavelength of horizontal vortices, the lateral distributions of the Reynolds stress, temporally-averaged longitudinal flow velocity, etc. The numerical simulation, which was performed for lateral transport of suspended sediment, has revealed that the transport is closely correlated with the large scale horizontal vortices.
Journal
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- Doboku Gakkai Ronbunshu
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Doboku Gakkai Ronbunshu 2000 (656), 135-144, 2000-08-21
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001205309399040
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- NII Article ID
- 10004544782
- 10008535024
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- NII Book ID
- AN10014020
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- ISSN
- 18827187
- 02897806
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- NDL BIB ID
- 5466278
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed