Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder
文献类型：期刊论文
| 作者 | Qi, Wen-Gang2,3 ; Liu, Jun2,3; Gao, Fu-Ping2,3; Li, Biao2,3; Chen, Qi-Gang1; Gao FP(高福平); Qi WG(漆文刚)
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| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2022 |
| 卷号 | 34期号:1页码:19 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0076648 |
| 通讯作者 | Gao, Fu-Ping(fpgao@imech.ac.cn) |
| 英文摘要 | The spatiotemporal evolution of the turbulent horseshoe vortex (THV) in front of a cylinder vertically mounted on a hydraulically smooth flat-bed was physically modeled in a large water flume. A particle image velocimetry (PIV) system with upward-illumination was, in particular, employed for the junction flow visualization. The examined Reynolds number was varied from 1.28 x 10(4) to 1.08 x 10(5), which is above the threshold of turbulent transition for a junction flow. Based on the PIV measurements, the characteristic features were presented for both the time-averaged and the instantaneous flow fields in a sheet flow at the upstream wall-cylinder junction. Statistical analyses on the experimental data are performed to characterize the spatial-temporal evolution of THV strength. The normalized THV strength in the time-averaged flow field increases first and then approaches a constant value with increasing the ratio of cylinder diameter to water depth. Two alternating patterns, i.e., the regular oscillation and the random wandering, are identified for the quasi-periodic oscillating behaviors of the instantaneous THV. It is found that the cumulative distribution curves for the normalized instantaneous THV strength can be described by the Weibul distribution. The present results provide a physical insight and quantitative characterization for the spatiotemporal evolution of THV, which is critical for predicting the associated wall shear stresses. |
| WOS关键词 | COMBINED WAVES ; LOCAL SCOUR ; FLOW ; LAMINAR ; DYNAMICS ; VELOCITY ; VORTICES ; MONOPILE |
| 资助项目 | National Natural Science Foundation of China[11972036] ; National Natural Science Foundation of China[11825205] ; Youth Innovation Promotion Association CAS[2021018] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000747725100010 |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/88417]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Gao, Fu-Ping |
| 作者单位 | 1.Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Wen-Gang,Liu, Jun,Gao, Fu-Ping,et al. Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder[J]. PHYSICS OF FLUIDS,2022,34(1):19. |
| APA | Qi, Wen-Gang.,Liu, Jun.,Gao, Fu-Ping.,Li, Biao.,Chen, Qi-Gang.,...&漆文刚.(2022).Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder.PHYSICS OF FLUIDS,34(1),19. |
| MLA | Qi, Wen-Gang,et al."Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder".PHYSICS OF FLUIDS 34.1(2022):19. |
入库方式： OAI收割
来源：力学研究所
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