On the Advection–Diffusion Process With Developing Eddies in Karst Conduits
Abstract Understanding the fluid flow and solute transport in karst conduits is significant for preventing pollutants (treated as solutes) in karst areas. This study evaluates the evolution of eddies in semi‐circular rough conduits under different hydrodynamic conditions and their effects on solute...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-12-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL111214 |
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| author | Zhongxia Li Yun Yang Hongbin Zhan Junwei Wan Jianmei Cheng Haibo Feng Xianshuo Yang |
| author_facet | Zhongxia Li Yun Yang Hongbin Zhan Junwei Wan Jianmei Cheng Haibo Feng Xianshuo Yang |
| author_sort | Zhongxia Li |
| collection | DOAJ |
| description | Abstract Understanding the fluid flow and solute transport in karst conduits is significant for preventing pollutants (treated as solutes) in karst areas. This study evaluates the evolution of eddies in semi‐circular rough conduits under different hydrodynamic conditions and their effects on solute transport. As inlet flow velocity increases, the non‐Fickian coefficient (a parameter used for qualifying the tailing of BTCs) increases first then decreases afterward. A critical equilibrium concentration is found when the concentration of the main flow stream and the concentration of the eddy zone reaches the same value, signaling the moment at which the mass transfer (due to diffusion) between the main flow stream and the eddy zone drops to zero. Such a critical equilibrium concentration and its corresponding moment of occurrence are found to follow two distinctive logarithmic functions of the inlet flow velocity. These findings provide crucial technical support for groundwater pollution control in karst areas. |
| format | Article |
| id | doaj-art-bc0dca2a41eb41d78d54c789171328a3 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bc0dca2a41eb41d78d54c789171328a32025-08-20T02:06:01ZengWileyGeophysical Research Letters0094-82761944-80072024-12-015123n/an/a10.1029/2024GL111214On the Advection–Diffusion Process With Developing Eddies in Karst ConduitsZhongxia Li0Yun Yang1Hongbin Zhan2Junwei Wan3Jianmei Cheng4Haibo Feng5Xianshuo Yang6School of Environmental Studies China University of Geosciences Wuhan ChinaSchool of Environmental Studies China University of Geosciences Wuhan ChinaDepartment of Geology and Geophysics Texas A & M University College Station TX USASchool of Environmental Studies China University of Geosciences Wuhan ChinaSchool of Environmental Studies China University of Geosciences Wuhan ChinaKey Laboratory of Mine Ecological Effects and Systematic Restoration Ministry of Natural Resources Beijing ChinaSchool of Environmental Studies China University of Geosciences Wuhan ChinaAbstract Understanding the fluid flow and solute transport in karst conduits is significant for preventing pollutants (treated as solutes) in karst areas. This study evaluates the evolution of eddies in semi‐circular rough conduits under different hydrodynamic conditions and their effects on solute transport. As inlet flow velocity increases, the non‐Fickian coefficient (a parameter used for qualifying the tailing of BTCs) increases first then decreases afterward. A critical equilibrium concentration is found when the concentration of the main flow stream and the concentration of the eddy zone reaches the same value, signaling the moment at which the mass transfer (due to diffusion) between the main flow stream and the eddy zone drops to zero. Such a critical equilibrium concentration and its corresponding moment of occurrence are found to follow two distinctive logarithmic functions of the inlet flow velocity. These findings provide crucial technical support for groundwater pollution control in karst areas.https://doi.org/10.1029/2024GL111214karst rough conduitseddiesadvection‐diffusion processsolute transport |
| spellingShingle | Zhongxia Li Yun Yang Hongbin Zhan Junwei Wan Jianmei Cheng Haibo Feng Xianshuo Yang On the Advection–Diffusion Process With Developing Eddies in Karst Conduits Geophysical Research Letters karst rough conduits eddies advection‐diffusion process solute transport |
| title | On the Advection–Diffusion Process With Developing Eddies in Karst Conduits |
| title_full | On the Advection–Diffusion Process With Developing Eddies in Karst Conduits |
| title_fullStr | On the Advection–Diffusion Process With Developing Eddies in Karst Conduits |
| title_full_unstemmed | On the Advection–Diffusion Process With Developing Eddies in Karst Conduits |
| title_short | On the Advection–Diffusion Process With Developing Eddies in Karst Conduits |
| title_sort | on the advection diffusion process with developing eddies in karst conduits |
| topic | karst rough conduits eddies advection‐diffusion process solute transport |
| url | https://doi.org/10.1029/2024GL111214 |
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