Numerical investigation of the collision of a vortex ring with a wavy sphere
The numerical investigation of vortex dynamics resulting from the collision of a vortex ring with a wavy sphere of various wavenumbers (n) at a Reynolds number of 1000 was conducted using a developed remeshed vortex particle method. The influence of the wall’s wavenumber on vortex dynamic mechanism...
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| Format: | Article |
| Language: | English |
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Vietnam Ministry of Science and Technology
2024-12-01
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| Series: | Vietnam Journal of Science, Technology and Engineering |
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| Online Access: | https://vietnamscience.vjst.vn/index.php/vjste/article/view/1248 |
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| _version_ | 1841558870482223104 |
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| author | Nguyen Van Luc Le Tuan Phuong Nam Phan Toai Tuyn |
| author_facet | Nguyen Van Luc Le Tuan Phuong Nam Phan Toai Tuyn |
| author_sort | Nguyen Van Luc |
| collection | DOAJ |
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The numerical investigation of vortex dynamics resulting from the collision of a vortex ring with a wavy sphere of various wavenumbers (n) at a Reynolds number of 1000 was conducted using a developed remeshed vortex particle method. The influence of the wall’s wavenumber on vortex dynamic mechanisms, such as the primary vortex ring’s deformation, the boundary layer’s separation, and the formation, interaction, and reconnection of secondary and tertiary vortices, was analysed. When the primary ring collides with a smooth sphere (n=0), secondary and tertiary rings are formed, and their interaction with the primary ring is similar to that observed with a flat plate. In the case of the wavy sphere, the boundary layer separates from the wall’s hills more rapidly than from the valleys, leading to the boundary layer rolling up into the secondary vortex in a wavy pattern. The segments of the secondary vortex originating from the hills move around the primary ring, while those from the valleys convect upwards, forming incomplete vortex loops at n=5. However, at n=9, the reconnection of segments from the valleys results in the formation of a chain of small-scale rings. Furthermore, tertiary vortices are generated from the valleys due to the additional separation of the wall boundary layer induced by the secondary vortex segments in the valleys. These vortices dissipate rapidly at n=5, whereas reconnection occurs to form additional vortex loops at n=9.
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| format | Article |
| id | doaj-art-ce3439e0fb79482ea1347407d406b962 |
| institution | Kabale University |
| issn | 2525-2461 2615-9937 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Vietnam Ministry of Science and Technology |
| record_format | Article |
| series | Vietnam Journal of Science, Technology and Engineering |
| spelling | doaj-art-ce3439e0fb79482ea1347407d406b9622025-01-06T02:53:52ZengVietnam Ministry of Science and TechnologyVietnam Journal of Science, Technology and Engineering2525-24612615-99372024-12-0166410.31276/VJSTE.2024.0056Numerical investigation of the collision of a vortex ring with a wavy sphereNguyen Van LucLe Tuan Phuong NamPhan Toai Tuyn The numerical investigation of vortex dynamics resulting from the collision of a vortex ring with a wavy sphere of various wavenumbers (n) at a Reynolds number of 1000 was conducted using a developed remeshed vortex particle method. The influence of the wall’s wavenumber on vortex dynamic mechanisms, such as the primary vortex ring’s deformation, the boundary layer’s separation, and the formation, interaction, and reconnection of secondary and tertiary vortices, was analysed. When the primary ring collides with a smooth sphere (n=0), secondary and tertiary rings are formed, and their interaction with the primary ring is similar to that observed with a flat plate. In the case of the wavy sphere, the boundary layer separates from the wall’s hills more rapidly than from the valleys, leading to the boundary layer rolling up into the secondary vortex in a wavy pattern. The segments of the secondary vortex originating from the hills move around the primary ring, while those from the valleys convect upwards, forming incomplete vortex loops at n=5. However, at n=9, the reconnection of segments from the valleys results in the formation of a chain of small-scale rings. Furthermore, tertiary vortices are generated from the valleys due to the additional separation of the wall boundary layer induced by the secondary vortex segments in the valleys. These vortices dissipate rapidly at n=5, whereas reconnection occurs to form additional vortex loops at n=9. https://vietnamscience.vjst.vn/index.php/vjste/article/view/1248fluid dynamicsvortex dynamicsvortex interactions |
| spellingShingle | Nguyen Van Luc Le Tuan Phuong Nam Phan Toai Tuyn Numerical investigation of the collision of a vortex ring with a wavy sphere Vietnam Journal of Science, Technology and Engineering fluid dynamics vortex dynamics vortex interactions |
| title | Numerical investigation of the collision of a vortex ring with a wavy sphere |
| title_full | Numerical investigation of the collision of a vortex ring with a wavy sphere |
| title_fullStr | Numerical investigation of the collision of a vortex ring with a wavy sphere |
| title_full_unstemmed | Numerical investigation of the collision of a vortex ring with a wavy sphere |
| title_short | Numerical investigation of the collision of a vortex ring with a wavy sphere |
| title_sort | numerical investigation of the collision of a vortex ring with a wavy sphere |
| topic | fluid dynamics vortex dynamics vortex interactions |
| url | https://vietnamscience.vjst.vn/index.php/vjste/article/view/1248 |
| work_keys_str_mv | AT nguyenvanluc numericalinvestigationofthecollisionofavortexringwithawavysphere AT letuanphuongnam numericalinvestigationofthecollisionofavortexringwithawavysphere AT phantoaituyn numericalinvestigationofthecollisionofavortexringwithawavysphere |