Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder

doi:10.1063/5.0076648

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Quantifying the spatiotemporal evolution of the turbulent horseshoe vortex in front of a vertical cylinder
	Qi, Wen-Gang 2,3; Liu, Jun 2,3; Gao, Fu-Ping 2,3; Li, Biao 2,3; Chen, Qi-Gang 1
刊名	PHYSICS OF FLUIDS
	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.
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关键词	COMBINED WAVES ; LOCAL SCOUR ; FLOW ; LAMINAR ; DYNAMICS ; VELOCITY ; VORTICES ; MONOPILE
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
内容类型	期刊论文
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.(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.