Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow
Vertically discharged multiple jets in crossflow is a common form of wastewater discharge. The presence of vegetation in the flow channel complicates the hydraulic characteristics of jets. The realizable <i>k-ε</i> turbulent model is used to simulate the flow, turbulence, and vortex char...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
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| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/15/15/2759 |
| _version_ | 1797585938089508864 |
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| author | Hao Yuan Chunhua Xia Guangde Zhao Ruichang Hu |
| author_facet | Hao Yuan Chunhua Xia Guangde Zhao Ruichang Hu |
| author_sort | Hao Yuan |
| collection | DOAJ |
| description | Vertically discharged multiple jets in crossflow is a common form of wastewater discharge. The presence of vegetation in the flow channel complicates the hydraulic characteristics of jets. The realizable <i>k-ε</i> turbulent model is used to simulate the flow, turbulence, and vortex characteristics of multiple jets with different spacing and jet-to-crossflow velocity ratios, to study the flow characteristics and vortex structure of multiple jets in a vegetated channel. The results reveal that vegetation inhibits the development of a counterrotating vortex pair. The jets with a low jet-to-crossflow velocity ratio are concentrated near the flow symmetry profile by the dual constraints of ambient flow and vegetation. The jets gradually spread outward and the counterrotating vortex pair become more obvious when the jet-to-crossflow velocity ratio increases. Vegetation reduces the shading effect of the front jet on the rear jet by accelerating the dissipation of shear layer vortices. The influence of the front jet on the rear jet decreases as the spacing increases. |
| first_indexed | 2024-03-11T00:13:50Z |
| format | Article |
| id | doaj.art-c1b56de6a6c74b7083b7956f7f33eeda |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T00:13:50Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-c1b56de6a6c74b7083b7956f7f33eeda2023-11-18T23:47:22ZengMDPI AGWater2073-44412023-07-011515275910.3390/w15152759Numerical Study of Multiple Momentum Jets in a Vegetated CrossflowHao Yuan0Chunhua Xia1Guangde Zhao2Ruichang Hu3Southwest Research Institute for Hydraulic and Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400016, ChinaSchool of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaChina Huaxi Engineering Design & Construction Co., Ltd., Chengdu 610031, ChinaSouthwest Research Institute for Hydraulic and Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400016, ChinaVertically discharged multiple jets in crossflow is a common form of wastewater discharge. The presence of vegetation in the flow channel complicates the hydraulic characteristics of jets. The realizable <i>k-ε</i> turbulent model is used to simulate the flow, turbulence, and vortex characteristics of multiple jets with different spacing and jet-to-crossflow velocity ratios, to study the flow characteristics and vortex structure of multiple jets in a vegetated channel. The results reveal that vegetation inhibits the development of a counterrotating vortex pair. The jets with a low jet-to-crossflow velocity ratio are concentrated near the flow symmetry profile by the dual constraints of ambient flow and vegetation. The jets gradually spread outward and the counterrotating vortex pair become more obvious when the jet-to-crossflow velocity ratio increases. Vegetation reduces the shading effect of the front jet on the rear jet by accelerating the dissipation of shear layer vortices. The influence of the front jet on the rear jet decreases as the spacing increases.https://www.mdpi.com/2073-4441/15/15/2759vegetated channelmultiple momentum jetsnumerical investigationturbulent characteristicsvortex structure |
| spellingShingle | Hao Yuan Chunhua Xia Guangde Zhao Ruichang Hu Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow Water vegetated channel multiple momentum jets numerical investigation turbulent characteristics vortex structure |
| title | Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow |
| title_full | Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow |
| title_fullStr | Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow |
| title_full_unstemmed | Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow |
| title_short | Numerical Study of Multiple Momentum Jets in a Vegetated Crossflow |
| title_sort | numerical study of multiple momentum jets in a vegetated crossflow |
| topic | vegetated channel multiple momentum jets numerical investigation turbulent characteristics vortex structure |
| url | https://www.mdpi.com/2073-4441/15/15/2759 |
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