Light over mechanics: microbial community structure and activity in simulated migrating bedforms are controlled by oscillating light rather than by mechanical forces. [PDF]
FEMS Microbiol EcolOprei A +5 more
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Scour below submerged skewed pipeline
Journal of Hydrology, 2014Summary Local scour below pipelines commonly occurs due to the erosive action of currents and waves. Scour is a major cause for the failure of underwater pipelines which is very important in water resources management. In this study, experiments were conducted to investigate the effect of four different pipeline orientations (30°, 45°, 60° and 90 ...
H Md Azamathulla
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Modelling Changes to Submarine Pipeline Embedment and Stability due to Pipeline Scour
Volume 5: Pipelines, Risers, and Subsea Systems, 2018 In this paper a beam bending model is combined with existing predictive formulas for pipeline scour to study changes to pipeline stability during scour and lowering. The model is introduced and demonstrated for a range of simplified conditions, including scour-induced lowering of a pipeline resulting from multiple uniformly spaced scour initiation ...
Scott Draper +4 more
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Mechanics of Pipeline Scour Propagation in the Spanwise Direction
Journal of Waterway, Port, Coastal and Ocean Engineering, 2015AbstractThis paper presents the results of an experimental study on the mechanics of pipeline scour propagation in the spanwise direction. The experiments were conducted with uniform sediment under a unidirectional steady current in clear-water conditions.
Yee-Meng Chiew, Chiew Yee-Meng
exaly +2 more sources
Modelling of Local Scour Below a Sagging Pipeline
Coastal Engineering Journal, 2003Local scour below a sagging pipeline is modelled by coupling a fluid flow model with a morphological model of the seabed. The fluid flow model solves spatial-filtered two-dimensional Navier–Stokes equations closed with the standard Smagorinsky subgrid scale model.
Liang Cheng, Fangjun Li
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Numerical Modeling of Local Scour Below a Piggyback Pipeline in Currents
Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium, 2006 Local scour under two pipelines of different diameters in steady currents is investigated numerically. The two pipelines are arranged in the so-called piggyback configuration where the small pipeline is located directly above the large pipeline (as shown in Fig. 1).
Zhao, Ming (R16667), Cheng, Liang
openaire +3 more sources
Steady current induced seabed scour around a vibrating pipeline
Applied Ocean Research, 2006 Most of the existing researches either focus on vortex-induced vibrations (VIVs) of a pipeline near a rigid boundary, or on seabed scour around a fixed pipeline.
Fu-Ping Gao
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Numerical investigation of local scour below a vibrating pipeline under steady currents
Coastal Engineering, 2010 Local scour below a vibrating pipeline under steady current is investigated by a finite element numerical model. The flow, sediment transport and pipeline response are coupled in the numerical model.
Ming Zhao
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Investigation on scour scale of piggyback pipeline under wave conditions [PDF]
Ocean Engineering, 2019 YesLaboratory experiments are presented to investigate the effect of different piggyback pipeline configurations on the morphology of local scour under wave conditions.
Shaopeng Yang, Yakun Guo
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Numerical investigation of local scour beneath a sagging subsea pipeline in steady currents
Coastal Engineering, 2018 Two dimensional (2-D) numerical simulations are conducted to predict scour below the midsection of the suspended span of a pipeline that sags naturally into a scour pit. The deflection of the pipeline is calculated based on the suspension length (or span
Ming Zhao, Scott Draper
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