Wave force variation due to burial of submarine pipelines in uniformly graded and low hydraulic conductivity soil

Neelamani, S.; Al-Banaa, K.

doi:10.1016/j.apor.2011.12.004

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…Because of its practical importance, and potential engineering applications, extensive investigations on the interaction between waves, seabed, and pipelines have been conducted in recent years, using both theoretical and experimental approaches [5,6]. However, understanding the results of studies on wave-seabed-trenched pipelines, with different backfilled depths, remains incomplete.…”

Section: Introductionmentioning

confidence: 99%

Physical Model of wave-induced seabed response around trenched pipeline in sandy seabed

Zhai

Zhao

et al. 2018

Applied Ocean Research

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The phenomenon of wave-seabed-pipeline interactions is one of the primary concerns of coastal engineers and researchers, as it could greatly affect the seabed instability and pipeline safety. Numerous researchers have expended great effort in studying wave-seabed-pipeline interactions in the past. However, the majority of them focussed on the wave-induced response around a submarine pipeline, in buried conditions, by numerical models and laboratory experiments. Unlike the previous studies, a series of regular wave experiments and numerical model analyses were conducted to investigate the wave-induced pore pressure in the sandy seabed, around a pipeline with different backfilled depths. The model pipeline with three diameters (D = 6 cm, 8 cm, and 10 cm) is buried in three sizes of sand, d50=0.15 mm, d 50 =0.3 mm, and d 50 =0.5 mm, with different backfilled depths. The results show that the pore pressure amplitude in the seabed is a minimum with a backfilled depth D, and a maximum with full backfill or a backfilled depth of zero. The pore-pressure amplitude increases as the backfill sand median diameter increases. The effects of the pipeline diameter on pore-water pressure are also analysed and discussed.

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Section: Introductionmentioning

confidence: 99%

Physical Model of wave-induced seabed response around trenched pipeline in sandy seabed

Zhai

Zhao

et al. 2018

Applied Ocean Research

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“…In this study, the interaction between wave and twin pipelines in porous seabed has been numerically investigated by solving a set of VARANS governing equations only. This mathematical model is validated by the laboratory experiments of Neelamani and Al-Banaa (2012) in term of dynamic pressures, showing a good agreement between measurement and simulation. This model is then further used to study distance between cylinder centers and burial depth of twin pipelines on the period-averaged wave velocity and pressure fields around the pipelines.…”

Section: Discussionmentioning

confidence: 73%

“…To validate the mathematical model, the numerical results will be compared with the experimental data of Neelamani and Al-Banaa (2012). This validated model is then further used to study the effects of center distance and burial depth of twin pipelines on the distribution of dynamic pressures and flow velocity.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 3, the nonlinear feature of the dynamic pressures is obvious due to the interaction between waves, porous seabed and twin pipelines. As mentioned by Neelamani and Al-Banaa (2012), the difference in magnitude and phase lag between P1 and P7 is mainly responsible for the horizontal force on pipeline, while the difference in magnitude and phase lag between P4 and P10 make the main contribution to the vertical force on pipeline. It is worth noting that the horizontal and vertical forces are dependent on the contribution of several pressure sensors, as a function of the sensor arrangement sketched in Figure 2.…”

Section: Model Validationmentioning

confidence: 93%

“…Although the interaction between waves, seabed and a single pipeline has been extensively investigated by the coastal researchers in the recent years (Magda, 1999;Vijayakumar et al, 2003Vijayakumar et al, , 2005Xu et al, 2010;Neelamani and Al-Banaa, 2012), the studies on the wave-seabed-twin pipelines are still very limited. For example, Bearman et al (1985) investigated theoretically and experimentally the in-line forces on cylinders of general crosssection under sinusoidal flows, and evaluated corrections to the standard in-viscid inertial force at low Keulegan-Carpenter (KC) numbers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical study on the interaction between waves and twin pipelines in sandy seabed

Zhang

Zheng

Zhang

et al. 2013

Journal of Coastal Research

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In offshore engineering practice, the construction of an identical cylinder close to the existing pipeline may largely affect the near flow field and hydrodynamic forces on the pipelines. The interaction between incident ocean wave and twin pipelines in sandy seabed plays an important role in the design of submarine pipelines. A mathematical model based on the Volume-Averaged Reynolds-Averaged Navier-Stokes (VARANS) equations, a two-equation k-ε turbulence closure and an internal source term wave maker is adopted to describe this complex phenomenon. The sandy bed where the pipelines are partly buried is treated as a rigid porous material, and its impact on wavepipeline interaction is considered in the VARANS model in terms of porosity and equivalent mean diameter of porous material. The impacts of burial depth and distance between the centers of twin pipelines on the waveseabed-twin pipelines interaction are numerically investigated. The research results from numerical simulations indicate that the burial depth and relative position of twin pipelines significantly affect the wave-averaged flow velocity and dynamic pressure distribution.

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Study of wave-induced seabed response around twin pipelines in sandy seabed through laboratory experiments and numerical simulations

et al. 2022

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Wave force variation due to burial of submarine pipelines in uniformly graded and low hydraulic conductivity soil

Cited by 5 publications

References 8 publications

Physical Model of wave-induced seabed response around trenched pipeline in sandy seabed

Physical Model of wave-induced seabed response around trenched pipeline in sandy seabed

Numerical study on the interaction between waves and twin pipelines in sandy seabed

Study of wave-induced seabed response around twin pipelines in sandy seabed through laboratory experiments and numerical simulations

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