Results 11 to 20 of about 424 (174)
Numerical Investigations on Scour and Flow around Two Crossing Pipelines on a Sandy Seabed
Journal of Marine Science and Engineering, 2022 When a pipeline is laid on the seabed, local scour often occurs below it due to sea currents. In practical engineering, there are some cases that two pipelines laid on the seabed need to cross with each other.
Fan Zhang +5 more
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Experimental Investigation of Scour Prediction Methods for Offshore Tripod and Hexapod Foundations
Journal of Marine Science and Engineering, 2020 Scour prediction is essential for the design of offshore foundations. Several methods have been proposed to predict the equilibrium scour depth for monopiles.
Xuan Ni, Leiping Xue
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Re-parameterization of equilibrium scour depths and time scales for monopiles
Coastal Engineering, 2023 Empirical formulations for the engineering prediction of equilibrium scour depths, as well as time scales (for both scour and backfilling), are re-visited for monopiles. Following prior work, it is argued on physical grounds that dimensionless time scales ought to scale proportionally to the Shields parameter raised to the −3/2 power, based on scaling ...
Bjarke Eltard Larsen, David R. Fuhrman
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Effect of Porosity on Local Scour Around Circular Array of Cylinders in Steady Currents
Shanghai Jiaotong Daxue xuebao, 2022 The local scour around a circular array of cylindrical piles through physical model was studied under the live-bed condition, concerning the effect of porosity of the structure on the local scour development.
LIU Shihang, LOU Xiaofan, TANG Guoqiang, WANG Bin
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Equilibrium Scour-Depth Prediction around Cylindrical Structures [PDF]
Journal of Waterway, Port, Coastal, and Ocean Engineering, 2017 Offshore gravity base foundations (GBFs) are often designed with complex geometries. Such structures interact with local hydrodynamics, creating an adverse pressure gradient that is responsible for flow and scour phenomena, including the bed shear stress amplification.
Tavouktsoglou, NS +3 more
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Numerical Simulation on the Local Scour Processing and Influencing Factors of Submarine Pipeline
Journal of Marine Science and Engineering, 2023 To investigate the different influencing characteristics of local scour around submarine pipelines, hydrodynamic and sediment transport two-dimensional models based on Flow-3D are used to numerically simulate the local scour around the pipeline under ...
Ke Hu, Xinglan Bai, Murilo A. Vaz
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Evolution of local scour downstream of Type A PK weir in non-cohesive sediments
Journal of Hydrology and Hydromechanics, 2022 A large-scale piano key weir laboratory study was conducted to investigate the evolution of the scour process occurring in the downstream basin for two non-cohesive granular bed materials, including the analysis of scour-hole geometry and patterns at ...
Lantz Wyatt D. +2 more
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Journal of Marine Science and Engineering, 2022 This paper reviews the recent development of numerical modelling of local scour around hydraulic and marine structures. The numerical models for simulating local scour are classified into five categories: sediment transport rate models, two-phase models,
Ming Zhao
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Evolution features of riverbeds near underwater crossing line pipes: An experimental study
Natural Gas Industry B, 2020 It is of important significance to study the evolution law of the riverbed near underwater crossing line pipes for ensuring the safe operation of oil and gas pipelines and reducing the risk of damage by water flood disasters.
Qian Yang +3 more
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Geosciences, 2019 Local scour is a dynamic process evolving during the lifetime of bridges as a result of the changes in hydrologic and hydraulic conditions. Current approaches for scour risk assessment are generally based on the evaluation of the equilibrium scour depth ...
Alonso Pizarro, Enrico Tubaldi
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