Clear-Water Scour below Underwater Pipelines under Steady Flow

Dey, Subhasish; Singh, Navneet P.

doi:10.1061/(asce)0733-9429(2008)134:5(588)

Cited by 57 publications

(19 citation statements)

References 17 publications

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“…Using this formula, an iterative method is proposed to predict the maximum scour depth. The predicted maximum scour depth using the present method is in good agreement with the laboratory measurements of Dey and Singh (2008) as well as being more accurate than those using the methods of Chao and Hennessey (1972) and Chiew (1991).This demonstrates that the proposed method can be applied to accurately predict clear-water scour depth below submarine pipelines under steady flow conditions. Regarding the application of the present method to predict the scour depth in practical engineering, the present method may slightly overestimate the scour depth.…”

Section: Discussionsupporting

confidence: 78%

“…After the numerical model is validated, the effect of the scour depth on the scour hole discharge can be investigated by simulating the flow field around the submarine pipeline for a range of the fixed scour profiles described by (Dey and Singh 2008):…”

Section: Numerical Schemes and Validation Casementioning

confidence: 99%

“…where a 0 ,a 1 ,a 2 and a 3 are parameters and taken as -0.931,-0.178,0.124, and -0.01 respectively (Dey and Singh 2008). Differentiating Eq.…”

Section: Numerical Schemes and Validation Casementioning

confidence: 99%

“…The results of 92 laboratory experimental data sets from Dey and Singh (2008) Present method as well as the C-H method and Chiew method is used to predict the scour depth. The predicted dimensionless scour depths using these three methods are compared with the measurements, as shown in Figures 8, 9 and 10, respectively.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

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Improving the prediction of scour around submarine pipelines

Zhang¹,

Shi²,

Guo³

et al. 2016

Proceedings of the Institution of Civil Engineers - Maritime En

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Local scour around submarine pipelines can affect the stability of the pipeline. The accurate estimation of the scour around submarine pipelines has been a hot topic of research among marine engineers. This paper presents results from a numerical study of clear-water scour depth below a submarine pipeline for a range of the steady flow conditions. The flow field around the pipeline under scour equilibrium condition is numerically simulated by solving the Reynolds-Averaged Navier-Stokes (RANS) equations with the standard k-ε turbulence closure. The flow discharge through the scour hole for various flow conditions is investigated. The results are used to establish the relationship between the flow discharge and the maximum scour depth. Incorporated with the Colebrook-White equation, the bed shear stress is obtained and an iterative method is proposed to predict the scour depth around the submarine pipeline. The calculated scour depths using the present method agree well with the laboratory measurements, with the average absolute relative error being smaller than that using previous methods, indicating that the proposed method can be used to predict the clear-water scour around the submarine pipeline with satisfactory accuracy.

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Section: Discussionsupporting

confidence: 78%

Section: Numerical Schemes and Validation Casementioning

confidence: 99%

“…where a 0 ,a 1 ,a 2 and a 3 are parameters and taken as -0.931,-0.178,0.124, and -0.01 respectively (Dey and Singh 2008). Differentiating Eq.…”

Section: Numerical Schemes and Validation Casementioning

confidence: 99%

Section: Comparison With Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

Improving the prediction of scour around submarine pipelines

Zhang¹,

Shi²,

Guo³

et al. 2016

Proceedings of the Institution of Civil Engineers - Maritime En

View full text Add to dashboard Cite

show abstract

“…Dey and Singh [38] conducted few experiments on clearwater scour below underwater pipelines in uniform and non-uniform sediments under steady flow. In our test case, we consider the depth of flow to be 350 mm, incoming fluid velocity as 500 mm/s, pipe diameter as 100 mm and 50 of sand as 0.36 mm.…”

Section: Comparison Of Bed Profilesmentioning

confidence: 99%

A parallel three-dimensional scour model to predict flow and scour below a submarine pipeline

Alam

Cheng

2010

Open Physics

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Abstract:A three-dimensional Lattice Boltzmann flow and scour model is developed to simulate time-dependent scour below a submarine pipeline. The proposed model presented in this paper is able to predict streamwise and spanwise propagations of scour with respect to lattice unit of time. It is evident from this study that the existence of a spiral vortex in the proximity of the span shoulder is quite noteworthy. It is revealed that the critical regime of the 2-D scour process is found to be up to one pipe diameter away in both directions from the middle of the unsupported length of pipelines. The equilibrium maximum scour depth and the shape of streamwise equilibrium scour hole compare well with the available experimental data. The speed of propagation of scour along the pipeline length maintains an almost constant rate, which is consistent with the experimental observations found in literature. In addition, it is seen that the scour slope at the shoulder region remains fairly constant throughout the whole scour process.

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Scour

Dey,

Ali

2024

GeoPlanet: Earth and Planetary Sciences

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Clear-Water Scour below Underwater Pipelines under Steady Flow

Cited by 57 publications

References 17 publications

Improving the prediction of scour around submarine pipelines

Improving the prediction of scour around submarine pipelines

A parallel three-dimensional scour model to predict flow and scour below a submarine pipeline

Scour

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