| Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder | |
Qi WG(漆文刚) ; Liu,Jun; Gao FP(高福平); Li B(李彪); Chen,QiGang
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| Corresponding Author | Gao, Fu-Ping([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2022 | |
| Volume | 34Issue:1Pages:19 |
| ISSN | 1070-6631 |
| Abstract | 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. |
| DOI | 10.1063/5.0076648 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000747725100010 |
| WOS Keyword | COMBINED WAVES ; LOCAL SCOUR ; FLOW ; LAMINAR ; DYNAMICS ; VELOCITY ; VORTICES ; MONOPILE |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[11972036] ; National Natural Science Foundation of China[11825205] ; Youth Innovation Promotion Association CAS[2021018] |
| Funding Organization | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Gao, Fu-Ping |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88418 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation GB/T 7714 | Qi WG,Liu,Jun,Gao FP,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.Rp_Au:Gao, Fu-Ping |
| APA | 漆文刚,Liu,Jun,高福平,李彪,&Chen,QiGang.(2022).Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder.PHYSICS OF FLUIDS,34(1),19. |
| MLA | 漆文刚,et al."Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder".PHYSICS OF FLUIDS 34.1(2022):19. |
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| Jp2022FA583.pdf（9917KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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