Velocity field and turbulence structure of the meandering flow produced by alternating deflectors
Abstract Meandering flow can be formed during the advance of natural rivers by the scouring of river banks. However, this phenomenon is not common in artificial cement channels. This study used experimental scouring terrain data for a numerical simulation to study the meandering flow pattern formed...
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| Format: | Article |
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Nature Portfolio
2024-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-58264-8 |
| _version_ | 1797219785781542912 |
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| author | Jie-min Zhan Wing-hong Onyx Wai Yu-tian Li Wen-qing Hu Ying-ying Luo |
| author_facet | Jie-min Zhan Wing-hong Onyx Wai Yu-tian Li Wen-qing Hu Ying-ying Luo |
| author_sort | Jie-min Zhan |
| collection | DOAJ |
| description | Abstract Meandering flow can be formed during the advance of natural rivers by the scouring of river banks. However, this phenomenon is not common in artificial cement channels. This study used experimental scouring terrain data for a numerical simulation to study the meandering flow pattern formed between double alternating deflectors in a straight channel. The numerical results showed that the path of the accelerated flow generated by the upstream deflector was changed by installing a downstream deflector while the flow rate remained unchanged. Thus, a meandering flow formed, and a stable, narrow, high-speed zone formed in the downstream area. The accelerated flow between the two deflectors hit the channel bank soon after its direction changed. Then, a strong downward flow formed in this area, which may have produced an elliptical scour hole. A large-scale vortex structure was formed in the elliptical scour hole, which was influenced by the horseshoe vortex system before the downstream deflector. |
| first_indexed | 2024-04-24T12:39:10Z |
| format | Article |
| id | doaj.art-2fa22df9a12647b38348b218050eaca7 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-24T12:39:10Z |
| publishDate | 2024-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-2fa22df9a12647b38348b218050eaca72024-04-07T11:18:18ZengNature PortfolioScientific Reports2045-23222024-04-0114111310.1038/s41598-024-58264-8Velocity field and turbulence structure of the meandering flow produced by alternating deflectorsJie-min Zhan0Wing-hong Onyx Wai1Yu-tian Li2Wen-qing Hu3Ying-ying Luo4Department of Applied Mechanics and Engineering, Shenzhen Campus of Sun Yat-sen UniversityDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic UniversityDepartment of Applied Mechanics and Engineering, Shenzhen Campus of Sun Yat-sen UniversityDepartment of Applied Mechanics and Engineering, Shenzhen Campus of Sun Yat-sen UniversityDepartment of Applied Mechanics and Engineering, Shenzhen Campus of Sun Yat-sen UniversityAbstract Meandering flow can be formed during the advance of natural rivers by the scouring of river banks. However, this phenomenon is not common in artificial cement channels. This study used experimental scouring terrain data for a numerical simulation to study the meandering flow pattern formed between double alternating deflectors in a straight channel. The numerical results showed that the path of the accelerated flow generated by the upstream deflector was changed by installing a downstream deflector while the flow rate remained unchanged. Thus, a meandering flow formed, and a stable, narrow, high-speed zone formed in the downstream area. The accelerated flow between the two deflectors hit the channel bank soon after its direction changed. Then, a strong downward flow formed in this area, which may have produced an elliptical scour hole. A large-scale vortex structure was formed in the elliptical scour hole, which was influenced by the horseshoe vortex system before the downstream deflector.https://doi.org/10.1038/s41598-024-58264-8DeflectorsMeandering flowHorseshoe vortex systemLarge eddy simulation |
| spellingShingle | Jie-min Zhan Wing-hong Onyx Wai Yu-tian Li Wen-qing Hu Ying-ying Luo Velocity field and turbulence structure of the meandering flow produced by alternating deflectors Scientific Reports Deflectors Meandering flow Horseshoe vortex system Large eddy simulation |
| title | Velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| title_full | Velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| title_fullStr | Velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| title_full_unstemmed | Velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| title_short | Velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| title_sort | velocity field and turbulence structure of the meandering flow produced by alternating deflectors |
| topic | Deflectors Meandering flow Horseshoe vortex system Large eddy simulation |
| url | https://doi.org/10.1038/s41598-024-58264-8 |
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