Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders
The wake flow field around the parallel twin cylinders is complex, and a variety of complex wake patterns appear at different spacings. In this paper, based on the finite volume method, a numerical simulation of the flow around two-dimensional parallel cylinders with different spacings at low Reynol...
| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
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China Astronautic Publishing CO., LTD. ; Editorial Office of Physics of Gases
2023-07-01
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| Series: | 气体物理 |
| Subjects: | |
| Online Access: | http://qtwl.xml-journal.net/cn/article/doi/10.19527/j.cnki.2096-1642.1027 |
| _version_ | 1797632634133676032 |
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| author | Jun-hui WANG Shu-ling TIAN |
| author_facet | Jun-hui WANG Shu-ling TIAN |
| author_sort | Jun-hui WANG |
| collection | DOAJ |
| description | The wake flow field around the parallel twin cylinders is complex, and a variety of complex wake patterns appear at different spacings. In this paper, based on the finite volume method, a numerical simulation of the flow around two-dimensional parallel cylinders with different spacings at low Reynolds number Re=200 was carried out. The flow field was ana-lyzed by modal comparison. The analysis results show that the proper orthogonal decomposition(POD) method can obtain the main characteristics of the dynamic system in space, and fewer modes contain most of the energy of the flow field. When the distance g=1.5 m, the interference between the upper and lower cylinders is weak, and the wake presents a periodic synchronous and co-directional pattern. When the distance g=0.35 m, the interference between the upper and lower cylinders is strong, and the flow phenomenon is more complicated. The wake presents an alternate flip pattern, and the flow field no longer has obvious periodic regularity. At the same time, the POD method can obtain the main spatial distribution chara-cteristics of the wake flow, with fewer modes containing most of the energy of the flow field, and the wake modal structure with a spacing of g=1.5 m is more compact and orderly than the modal structure with a spacing of g=0.35 m, which is closely related to the wake flow patterns under different spacing g. |
| first_indexed | 2024-03-11T11:39:37Z |
| format | Article |
| id | doaj.art-7da44c293ab748d9b4dfd6a987bed490 |
| institution | Directory Open Access Journal |
| issn | 2096-1642 |
| language | zho |
| last_indexed | 2024-03-11T11:39:37Z |
| publishDate | 2023-07-01 |
| publisher | China Astronautic Publishing CO., LTD. ; Editorial Office of Physics of Gases |
| record_format | Article |
| series | 气体物理 |
| spelling | doaj.art-7da44c293ab748d9b4dfd6a987bed4902023-11-10T06:27:30ZzhoChina Astronautic Publishing CO., LTD. ; Editorial Office of Physics of Gases气体物理2096-16422023-07-0184465410.19527/j.cnki.2096-1642.1027qtwl-8-4-46Proper Orthogonal Decomposition of Flow Past Parallel Twin CylindersJun-hui WANG0Shu-ling TIAN1College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaThe wake flow field around the parallel twin cylinders is complex, and a variety of complex wake patterns appear at different spacings. In this paper, based on the finite volume method, a numerical simulation of the flow around two-dimensional parallel cylinders with different spacings at low Reynolds number Re=200 was carried out. The flow field was ana-lyzed by modal comparison. The analysis results show that the proper orthogonal decomposition(POD) method can obtain the main characteristics of the dynamic system in space, and fewer modes contain most of the energy of the flow field. When the distance g=1.5 m, the interference between the upper and lower cylinders is weak, and the wake presents a periodic synchronous and co-directional pattern. When the distance g=0.35 m, the interference between the upper and lower cylinders is strong, and the flow phenomenon is more complicated. The wake presents an alternate flip pattern, and the flow field no longer has obvious periodic regularity. At the same time, the POD method can obtain the main spatial distribution chara-cteristics of the wake flow, with fewer modes containing most of the energy of the flow field, and the wake modal structure with a spacing of g=1.5 m is more compact and orderly than the modal structure with a spacing of g=0.35 m, which is closely related to the wake flow patterns under different spacing g.http://qtwl.xml-journal.net/cn/article/doi/10.19527/j.cnki.2096-1642.1027flow past cylinderswakenumerical simulationproper orthogonal decompositionmode |
| spellingShingle | Jun-hui WANG Shu-ling TIAN Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders 气体物理 flow past cylinders wake numerical simulation proper orthogonal decomposition mode |
| title | Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders |
| title_full | Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders |
| title_fullStr | Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders |
| title_full_unstemmed | Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders |
| title_short | Proper Orthogonal Decomposition of Flow Past Parallel Twin Cylinders |
| title_sort | proper orthogonal decomposition of flow past parallel twin cylinders |
| topic | flow past cylinders wake numerical simulation proper orthogonal decomposition mode |
| url | http://qtwl.xml-journal.net/cn/article/doi/10.19527/j.cnki.2096-1642.1027 |
| work_keys_str_mv | AT junhuiwang properorthogonaldecompositionofflowpastparalleltwincylinders AT shulingtian properorthogonaldecompositionofflowpastparalleltwincylinders |