On the interaction of vortical structures and shear layer in turbulent flow around trapezoidal prisms with varying aspect ratios
文献类型：期刊论文
| 作者 | Abdul-Salam, Fati Bio2; Sagharichi, Amir2; Fang XJ(方兴军)1,2; Tachie, Mark F.2 |
| 刊名 | EXPERIMENTAL THERMAL AND FLUID SCIENCE
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 169页码:16 |
| 关键词 | Trapezoidal prism Flow separation Asymmetric wake Unsteady Dynamics PIV |
| ISSN号 | 0894-1777 |
| DOI | 10.1016/j.expthermflusci.2025.111570 |
| 通讯作者 | Abdul-Salam, Fati Bio(abdulsa8@myumanitoba.ca) |
| 英文摘要 | The spatiotemporal dynamics of turbulent flow induced by trapezoidal prisms in a uniform flow are studied using time-resolved particle image velocimetry (TR-PIV). Three prisms with aspect ratios (AR, defined as the ratio between lower surface length and height) of 1, 2, and 3 (denoted as AR1, AR2, and AR3, respectively) were tested at a Reynolds number of 10000 based on the incoming velocity and prism height. In the wake region of the prisms, two recirculation bubbles form. For the AR1 prism, the bubbles are almost symmetric in size, whereas for AR2 and AR3 prisms, the upper bubble is significantly larger than the lower one. The peak values of the Reynolds stresses in the wake region decrease with increasing AR. Quadrant analysis reveals that the strength of sweep and ejection events increases with decreasing aspect ratio, enhancing flow recovery within the recirculation zone. The vertical derivative of Reynolds shear stress plays a major role in the higher flow recovery for AR1, but as the aspect ratio increases to 3, the vertical derivative of tangential momentum becomes the dominant factor. The nondimensional fundamental shedding frequencies for the AR1 and AR2 prisms are 0.13 and 0.11, respectively, whereas dual shedding frequencies of 0.05 and 0.12 are observed for the AR3 prism. Frequency synchronization induced by von Ka |
| 分类号 | 二类/Q1 |
| WOS关键词 | RECTANGULAR CYLINDER ; SQUARE CYLINDER ; WALL REGION ; WAKE ; INSTABILITIES ; MOMENTUM ; VELOCITY ; HEAT ; LES |
| 资助项目 | Natural Science and Engineering Research Council of Canada (NSERC) ; Canada Foundation for Innovation (CFI) |
| WOS研究方向 | Thermodynamics ; Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001540635100001 |
| 资助机构 | Natural Science and Engineering Research Council of Canada (NSERC) ; Canada Foundation for Innovation (CFI) |
| 其他责任者 | Abdul-Salam, Fati Bio |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102202]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China 2.Univ Manitoba, Dept Mech Engn, Winnipeg, MB, Canada; |
| 推荐引用方式 GB/T 7714 | Abdul-Salam, Fati Bio,Sagharichi, Amir,Fang XJ,et al. On the interaction of vortical structures and shear layer in turbulent flow around trapezoidal prisms with varying aspect ratios[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2025,169:16. |
| APA | Abdul-Salam, Fati Bio,Sagharichi, Amir,方兴军,&Tachie, Mark F..(2025).On the interaction of vortical structures and shear layer in turbulent flow around trapezoidal prisms with varying aspect ratios.EXPERIMENTAL THERMAL AND FLUID SCIENCE,169,16. |
| MLA | Abdul-Salam, Fati Bio,et al."On the interaction of vortical structures and shear layer in turbulent flow around trapezoidal prisms with varying aspect ratios".EXPERIMENTAL THERMAL AND FLUID SCIENCE 169(2025):16. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。