Investigation on the Local Scour Beneath Piggyback Pipelines Under Clear-Water Conditions

Asrari, Sahar; Hakimzadeh, Habib; Kardan, Nazila

doi:10.1007/s13344-021-0039-7

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…Figure 5 gives the experimental photographs of scour profiles at the moment t = 200 min for single and piggyback pipelines (G/D = 0, 0.1, 0.2, and 0.3). For the piggyback pipeline, the scour hole has an asymmetrical shape, and the similar scour profiles were also reported by Zhao and Cheng [22], Zhao et al [25], Yang et al [19], and Asrari et al [33] for the piggyback pipeline and Sumer et al [9], Larsen et al [34], and Xu et al [35] for the single pipeline. Figure 5 gives the experimental photographs of scour profiles at the moment t = 200 min for single and piggyback pipelines (G/D = 0, 0.1, 0.2, and 0.3).…”

Section: Scour Evolution and Scour Morphologysupporting

confidence: 80%

Scour Characteristics and Equilibrium Scour Depth Prediction around a Submarine Piggyback Pipeline

Wang

Liu

et al. 2022

JMSE

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Local scour around a submarine piggyback pipeline in combined waves and current is investigated experimentally. Based on the experimental results, the scour evolution and scour morphology are firstly analyzed. Then, a comparison with the equilibrium scour depth Seq between the present experimental data and predicted results is conducted. After that, the correlation between the dimensionless scour timescale T* and the maximum Shields parameter θcw is investigated, and a formula is obtained to describe the variation trend between T* and θcw for different gap ratios G/D. Furthermore, the parametric study is carried out to study the effects of Reynolds number Red and θcw on Seq, respectively. The results indicate that the Seq below the piggyback pipeline increases when the gap ratio G/D increases from 0 to 0.1, and it gradually decreases when G/D > 0.1. For a given KC, the Seq increases with the increase of the ratio of velocities Ucw. In addition, when Ucw is fixed, a higher KC results in a greater Seq. The T* is closely related to θcw and G/D. The higher Red and θcw both tend to result in the greater scour depth below a piggyback pipeline in combined waves and current.

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Section: Scour Evolution and Scour Morphologysupporting

confidence: 80%

Scour Characteristics and Equilibrium Scour Depth Prediction around a Submarine Piggyback Pipeline

Wang

Liu

et al. 2022

JMSE

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show abstract

“…Yang et al [6] studied the influence of different piggyback configurations on local seabed scour patterns under the action of steady flow through laboratory tests and numerical simulation. Asrari Sahar et al [7] studied the effect of the pipeline diameter ratio and the gap ratio between pipelines on the scour below the piggyback pipeline under the action of steady flow through numerical simulation and experimental testing. Janocha Marek Jan et al [8] studied the vortex-induced vibrations of the piggyback pipeline near the horizontal wall in the upper transition zone.…”

Section: Introductionmentioning

confidence: 99%

Study on Hydrodynamic Coefficients of a Submarine Piggyback Pipeline under the Action of Waves and Current

Cheng

Yang

et al. 2021

JMSE

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In this study, physical model tests are used to investigate the effects of a varying number of wave and current parameters, the gap ratios between the pipeline and seabed, the spacing ratios between the two pipelines and the diameter ratios on the hydrodynamic coefficients of the large, small pipeline and pipeline system (bundle) in a piggyback configuration under the combined action of waves and current. The results show that, compared with the pure wave field, the existence of the steady current will lead to a decrease in hydrodynamic coefficients. In addition, the results indicate clear differences between the hydrodynamic coefficients of the large pipeline, small pipeline and piggyback pipeline system. The experimental results on hydrodynamic coefficients can be used as an important basis for the safety design of a submarine piggyback pipeline.

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Machine learning algorithms on predicting the turbulent mixed convection flow in a driven-cavity with two horizontal cylinders

Samanta,

Sarkar,

Das

et al. 2024

International Communications in Heat and Mass Transfer

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Investigation on the Local Scour Beneath Piggyback Pipelines Under Clear-Water Conditions

Cited by 5 publications

References 21 publications

Scour Characteristics and Equilibrium Scour Depth Prediction around a Submarine Piggyback Pipeline

Scour Characteristics and Equilibrium Scour Depth Prediction around a Submarine Piggyback Pipeline

Study on Hydrodynamic Coefficients of a Submarine Piggyback Pipeline under the Action of Waves and Current

Machine learning algorithms on predicting the turbulent mixed convection flow in a driven-cavity with two horizontal cylinders

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