| Blockage ratio and Reynolds number effects on flows around a rectangular prism | |
| Abdul-Salam, Fati Bio; Fang XJ(方兴军); Tachie, Mark Francis | |
| Corresponding Author | Abdul-Salam, Fati Bio([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
 |
| 2023-09-01 | |
| Volume | 35Issue:9Pages:21 |
| ISSN | 1070-6631 |
| Abstract | The combined effects of blockage ratio (BR) and Reynolds number (Re) on the spatiotemporal characteristics of turbulent flow separation around a rectangular prism with depth-to-thickness ratio of 3 were investigated using a time-resolved particle image velocimetry. Four different blockage ratios (BR = 2.5%, 5%, 10%, and 15%) were examined at Reynolds numbers of 3000, 7500, and 15000. Two regimes (unattached and reattached) were identified; however, the boundary between these regimes shows a complex dependency on BR and Re. The mean flow does not reattach onto the prism at low BR and Re but tends to reattach when BR and Re increase. The wake vortices are relatively larger for the unattached test cases. The separation bubbles over and in the wake of the prism are dynamically coupled for prisms in the unattached regime but independent of each other in the reattached regime. Spectral analyses of the velocity fluctuations and coefficient of the first proper orthogonal decomposition mode pair reveal a single dominant peak at the same fundamental shedding frequency for the reattached test cases, whereas multiple competing frequencies are observed for test cases in the unattached regime. The Kelvin-Helmholtz frequency increases with an increase in BR and Re. The vortical structures are more organized for prisms in the reattached regime, and their convective velocities in the wake are comparatively higher. |
| DOI | 10.1063/5.0165627 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001078492700005 |
| WOS Keyword | TURBULENT SEPARATIONS ; COHERENT STRUCTURES ; SQUARE ; WAKE ; CYLINDER ; AERODYNAMICS ; BODY |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | The authors are grateful for the financial support from the Natural Science and Engineering Research Council of Canada (NSERC) to Mark F. Tachie. We are also grateful to Canada Foundation for Innovation (CFI) for their invaluable support in funding the exp ; Natural Science and Engineering Research Council of Canada (NSERC) ; Canada Foundation for Innovation (CFI) |
| Funding Organization | The authors are grateful for the financial support from the Natural Science and Engineering Research Council of Canada (NSERC) to Mark F. Tachie. We are also grateful to Canada Foundation for Innovation (CFI) for their invaluable support in funding the exp ; Natural Science and Engineering Research Council of Canada (NSERC) ; Canada Foundation for Innovation (CFI) |
| Classification | 一类/力学重要期刊 |
| Ranking | 2 |
| Contributor | Abdul-Salam, Fati Bio |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/93132 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation GB/T 7714 | Abdul-Salam, Fati Bio,Fang XJ,Tachie, Mark Francis. Blockage ratio and Reynolds number effects on flows around a rectangular prism[J]. PHYSICS OF FLUIDS,2023,35,9,:21.Rp_Au:Abdul-Salam, Fati Bio |
| APA | Abdul-Salam, Fati Bio,方兴军,&Tachie, Mark Francis.(2023).Blockage ratio and Reynolds number effects on flows around a rectangular prism.PHYSICS OF FLUIDS,35(9),21. |
| MLA | Abdul-Salam, Fati Bio,et al."Blockage ratio and Reynolds number effects on flows around a rectangular prism".PHYSICS OF FLUIDS 35.9(2023):21. |
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| Jp2023A005.pdf（9715KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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