Numerical Investigation of the Influence of Water Jumping on the Local Scour beneath a Pipeline under Steady Flow

doi:10.3390/w9090642

	Numerical Investigation of the Influence of Water Jumping on the Local Scour beneath a Pipeline under Steady Flow
	Fan, Fei 1; Liang, Bingchen 2; Li, Yaru 3,4; Bai, Yuchuan 1; Zhu, Yanjun 5; Zhu, Zhixia 5
刊名	WATER
	2017-09
卷号	9 期号:9
关键词	scour under a pipeline free surface rigid lid assumption CFD model
ISSN号	2073-4441
DOI	10.3390/w9090642
英文摘要	Rigid-lid approximation is usually used to replace the free surface in scour simulation. The influence of the rigid lid assumption on the prediction precision of scour hole in steady flow is studied in this paper. Firstly, a local scour model was constructed based on the open sources Computational Fluid Dynamics (CFD) model OpenFOAM, where both the bed load and suspended load were considered. In the present model, the bed shear stress was calculated by the Newton shear stress formula, instead of the traditional calculation method with the assumption that the flow velocity in vertical direction complies with a logarithmic distribution. The Volume of Fluid (VOF) method was used to capture the free surface and a moving-mesh method was used to track the change of bed surface. Then, several experiments were chosen to validate the model, and the modeling results fitted well with the measured data. Lastly, the effect of the rigid lid assumption on surface elevation, bed shear stress and the profile of the scour hole in steady flow are studied. The result shows that the surface elevation suffers a drop above the pipeline, and the difference of surface elevation between the upstream and downstream increases with decreasing dimensionless depth. Compared with the free surface condition, the bed shear stress and scour hole depth computed with the rigid lid approximation were underestimated.
资助项目	111 Project[B14028]
WOS研究方向	Water Resources
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000411567200016
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3105]
专题	自然资源部第一海洋研究所
作者单位	1.Tianjin Univ, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China; 2.Ocean Univ China, Coll Engn, Qingdao 266100, Peoples R China; 3.State Ocean Adm, North China Sea Marine Forecasting Ctr, Qingdao 266100, Peoples R China; 4.Shandong Prov Key Lab Marine Ecol Environm & Disa, Qingdao 266100, Peoples R China; 5.Jiangsu Prov Water Transport Engn Technol Res Ctr, Nanjing 210000, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Fan, Fei,Liang, Bingchen,Li, Yaru,et al. Numerical Investigation of the Influence of Water Jumping on the Local Scour beneath a Pipeline under Steady Flow[J]. WATER,2017,9(9).
APA	Fan, Fei,Liang, Bingchen,Li, Yaru,Bai, Yuchuan,Zhu, Yanjun,&Zhu, Zhixia.(2017).Numerical Investigation of the Influence of Water Jumping on the Local Scour beneath a Pipeline under Steady Flow.WATER,9(9).
MLA	Fan, Fei,et al."Numerical Investigation of the Influence of Water Jumping on the Local Scour beneath a Pipeline under Steady Flow".WATER 9.9(2017).