Abstract
A two-dimensional numerical model of vertical jet scour was developed based on the turbulent flow theory and jet scour mechanism. In this model, drag force acts as the main reference variable and the critical Shields number acts as the incipient motion criteria of sediment. The morphological change in the bed caused by bed-load transport is simulated using the moving mesh method and the suspended-load is not considered. An experiment investigating vertical clear water jet scour was conducted in the laboratory, and some effective experimental results, such as flow patterns and distribution characteristics of scour pits, were obtained. Numerical simulation of the 2D jet scour was conducted using the same parameters as were used in the flume experiment. The evolution process of the jet scour observed in the experiment was simulated by the new model; validation of the numerical model and the algorithm was conducted. Semi-empirical formulas of the characteristic length of the equilibrium scour hole were deduced based on the results of the experiment and simulation.
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References
Yu C Z. Turbulent Jet (in Chinese). Beijing: Higher Education Press, 1993
Li W X. Experiments of scour caused by a wall jet (in Chinese). J Sediment Res, 1995, 4: 50–59
Li W X, Li C L. Analysis of local sour caused by a two-dimensional wall jet (in Chinese). J Sediment Res, 1996, 4: 62–68
Westrich B, Kobus H. Erosion of a uniform sand bed by continuous and pulsating jets. Proc IAHR Congress, 1973. 91–98
Mih W C, Kabir J. Impingement of water jets on non-uniform stream bed. J Hydraul Eng, 1983, 109,4: 536–548
Aderibigbe O O, Rajaratnam N. Erosion of loose beds by submerged circular impinging vertical turbulent jets. J Hydraul Res, 1996, 34: 19–33
Aderibigbe O. Effect of sediment gradation on erosion by plane turbulent wall jets. J Hydraul Eng, 1998, 124: 1034–1042
Rajaratnam N, Mazurek K A. Erosion of sand by circular impinging water jets with small tailwater. J Hydraul Eng, 2003, 129: 225–229
Yüksel A C, Elikoglu Y C, Evik E, et al. Jet scour around vertical piles and pile groups. Ocean Eng, 2005, 32: 349–362
Li F J, Cheng L. Numerical model for local scour under offshore pipelines. J Hydraul Eng, 1999, 125: 400–406
Liang D F, Cheng L, Li F J. Numerical modeling of flow and scour below a pipeline in currents. Part II: Scour simulation. Coast Eng, 2005, 52: 43–62
Salaheldin T M, Imran J, Hanif C M. Numerical modeling of three-dimensional flow field around circular piers. J Hydraul Eng, 2004, 130: 91–100
Roulund A, Sumer B M, Fredsoe J, et al. Numerical and experimental investigation of flow and scour around a circular pile. J Fluid Mech, 2005, 534: 351–401
Lu L, Li Y, Qin J. Numerical simulation of the equilibrium profile of local scour around submarine pipelines based on renormalized group turbulence model. Ocean Eng, 2005, 32: 2007–2019
Liu X, García M H. Three-dimensional numerical model with free water surface and mesh deformation for local sediment scour. J Waterway, Port, Coast, Ocean Eng, 2008, 134: 203–217
Zhao M, Cheng L. Numerical modeling of local scour below a piggyback pipeline in currents. J Hydraul Eng, 2008, 134: 1452–1463
Yüksel O A, Yüksel Y I. Simulation of a 3D submerged jet flow around a pile. Ocean Eng, 2010, 37: 819–832
Li F J, Cheng L. Prediction of lee-wake scouring of pipelines in currents. J Waterway, Port, Cast, Ocean Eng, 2001, 127: 106–112
Yakhot V, Orszag S A. Renormalization group analysis of turbulence. I. Basic theory. J Sci Comp, 1986, 1: 3–51
Chen B. The numerical simulation of local scour in front of a vertical-wall breakwater. J Hydrodynam Ser B, 2006, 18: 134–138
Zhang R J. River Sediment Dynamics (in Chinese). Beijing: China Water Power Press, 1998
Engelund F, Fredsoe J. A sediment transport model for straight alluvial channels. Nord Hydrol, 1976, 7: 293–306
Allen J. Simple models for the shape and symmetry of tidal sand waves: (1) statically stable equilibrium forms. Marin Geol, 1982, 48: 31–49
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Huai, W., Wang, Z., Qian, Z. et al. Numerical simulation of sandy bed erosion by 2D vertical jet. Sci. China Technol. Sci. 54, 3265–3274 (2011). https://doi.org/10.1007/s11431-011-4574-y
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DOI: https://doi.org/10.1007/s11431-011-4574-y