Blockage effects on flow around rectangular prisms in uniform flow☆
文献类型：期刊论文
| 作者 | AbdulSalam, Fati B3; Kumahor, Sedem3; Fang XJ(方兴军)2,3; Essel, Ebenezer E1; Tachie, Mark F3 |
| 刊名 | EXPERIMENTAL THERMAL AND FLUID SCIENCE
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 169页码:13 |
| 关键词 | Blockage ratio Flow separation PIV Vortex shedding |
| ISSN号 | 0894-1777 |
| DOI | 10.1016/j.expthermflusci.2025.111567 |
| 通讯作者 | Abdul-Salam, Fati B.(abdulsa8@myumanitoba.ca) |
| 英文摘要 | The influence of blockage ratio on the flow around a rectangular prism was experimentally investigated using a time-resolved particle image velocimetry system. Three different blockage ratios (BR = 2.5 %, 5 %, and 10 %) were tested, with a fixed streamwise aspect ratio (AR = 3) and a Reynolds number of 7500. The results indicate that, for BR = 2.5 %, the separated shear layer from the leading edge of the prism is shed directly into the wake, however, an increase of BR promotes the reattachment on the surface of the prism. The streamwise extent of the primary, secondary and wake recirculation bubbles decrease with an increase in blockage ratio. Distinct regions of positive and negative Reynolds shear stress manifest near the leading edge, with the transitioning interface shifting upstream with increasing BR. Turbulence production concentrates near the shear layer, with peak magnitude increasing and shifting upstream with BR. The growth rate of the shear layer is similar for the reattached test cases but decrease for the unattached test cases. The spatial coherence of the turbulent structures increases downstream, however, the effects of blockage significantly reduced the spatial coherence in the BR10 case. Frequency spectra and spectral decomposition of the Reynolds normal stresses revealed that increasing the blockage ratio increases the dominance of von Ka |
| 分类号 | 二类/Q1 |
| WOS关键词 | REYNOLDS-NUMBER ; TURBULENT-FLOW ; UPSTREAM ROUGHNESS ; SHEAR-LAYER ; CYLINDER ; WAKE ; AERODYNAMICS ; SIMULATION |
| 资助项目 | Natural Sciences and Engineering Research Council (NSERC) of Canada ; Canada Foundation for Innovation (CFI) |
| WOS研究方向 | Thermodynamics ; Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001542046300001 |
| 资助机构 | Natural Sciences and Engineering Research Council (NSERC) of Canada ; Canada Foundation for Innovation (CFI) |
| 其他责任者 | Abdul-Salam, Fati B. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103807]  |
| 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.Concordia Univ, Dept Mech Ind & Aerosp Engn, Montreal, PQ, Canada 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; 3.Univ Manitoba, Dept Mech Engn, Winnipeg, MB, Canada; |
| 推荐引用方式 GB/T 7714 | AbdulSalam, Fati B,Kumahor, Sedem,Fang XJ,et al. Blockage effects on flow around rectangular prisms in uniform flow☆[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2025,169:13. |
| APA | AbdulSalam, Fati B,Kumahor, Sedem,方兴军,Essel, Ebenezer E,&Tachie, Mark F.(2025).Blockage effects on flow around rectangular prisms in uniform flow☆.EXPERIMENTAL THERMAL AND FLUID SCIENCE,169,13. |
| MLA | AbdulSalam, Fati B,et al."Blockage effects on flow around rectangular prisms in uniform flow☆".EXPERIMENTAL THERMAL AND FLUID SCIENCE 169(2025):13. |
入库方式： OAI收割
来源：力学研究所
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