Numerical Analysis of Hydrodynamics Around Submarine Pipeline End Manifold (PLEM) Under Tsunami-Like Wave

Zhao, Enjin; Tang, Ye; Shao, Jie; Mu, Lin

doi:10.1109/access.2019.2957395

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…In this model, the renormalization-group (RNG) k-ε turbulence model was implemented as the turbulence closure, which has been successfully employed to investigate the turbulence field around the structure and the whole computational domain under the interaction between structure and water [29,30]. The volume of fluid (VOF) method was used to capture the interface between the air and water [31][32][33], and the pressure and velocity was coupled by the generalized minimal residual methods (GMRES) pressure-velocity solvers. In the free surface flow, the mass and momentum conservation equations in the flow can be expressed as…”

Section: Hydrodynamic and Turbulence Modulementioning

confidence: 99%

Numerical Investigation on Generation and Propagation Characteristics of Offshore Tsunami Wave under Landslide

et al. 2020

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Tsunamis induced by the landslide will divide into a traveling wave component propagating along the coastline and an offshore wave component propagating perpendicular to the coastline. The offshore tsunami wave has the non-negligible energy and destruction in enclosed basins as fjords, reservoirs, and lakes, which are worth studying. The initial submergence condition, the falling height and sliding angle of slider, are important reference indexes of damage degree of landslide and may also matter at that of the landslide-induced tsunami. Depending on the fully coupled model, the effects of them on the production and propagation of the tsunami were considered in the study. Since the slider used was semi-elliptic, the effect of the ratio of the long axis to the short axis was also analyzed. According to the computational fluid dynamics theory, a numerical wave tank was developed by the immersed boundary (IB) method; besides, the general moving-object module of slide mass was also embedded to the numerical tanker. The results indicate that the effects of the squeezing and pushing of the slider on water produce a naturally attenuated wave at the front of the wave train, and the attenuation becomes more serious with the increase in the initial submersion range of the slider. The effects of the vertical movement of the slider cause the increase in the amplitude of the back of the wave train. As the falling height increases, the large wave height increases when the slider is initially submerged and decreases when it is not initially submerged, except for the accidental elevation of that at smaller falling heights. The results also indicate that the hazard of the subaerial landslide-induced tsunami is greater under a small or large falling angle, and that of the partial subaerial and submarine landslide-induced tsunami is greater under a small falling angle. With the increase in the ratio of the long axis to the short axis, the total induced wave energy decreases and the shape of the wave train proportionally reduces, while the wave propagation mode does not change.

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Section: Hydrodynamic and Turbulence Modulementioning

confidence: 99%

Numerical Investigation on Generation and Propagation Characteristics of Offshore Tsunami Wave under Landslide

et al. 2020

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“…The side plate and bottom plate of the flat circle is used to install instruments. The instrument cable shall be penetrated into the cabin from the bottom to the top, and the cable outside the instrument cabin is extended by the embedded threading pipe in the buoy hull, and the outer side is covered by the arc cover plate that has been cut off to prevent the direct impact from the wave and the atmospheric exposure [21]. Fig.…”

Section: A Buoy Designmentioning

confidence: 99%

An Innovative Multifunctional Buoy Design for Monitoring Continuous Environmental Dynamics at Tianjin Port

Hao

Zhang

2020

IEEE Access

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The Tianjin port plays a relevant role in driving both ship navigation and the weather and climate of the area. To better understand the underlying peculiarities of this area, several in-service coastal ocean system and facilities have been constructed, at present, the whole coastal ocean systems at Tianjin port have been improved, however, they cannot meet the safety requirements of traffic management and navigational safety. Marine buoys have the unreplaceable advantages of long-term, real-time, reliable capabilities and trivial environmental restrictions to monitor the marine dynamics. Here an innovative multifunctional buoy prototype is proposed to continuously measure meteorological and oceanographic parameters at a high spatial and temporal resolution, which can ensure navigation safety at Tianjin Port. Solar panels and battery module are personalized to ensure electric supply to the buoy system. An independent ARM (Advanced RISC Machine)-based module is affiliated to maintain the stability of the data acquisition and communication module. Buoy platform based on Beidou difference is proved to be an effective approach for the tide measurement. Additionally, a web-designed software for data acquisition is integrated for the visualization purpose. Finally, in-field recording test at Tianjin port will be performed to verify effectiveness of our system on monitoring environment dynamics. It turns out that our buoy prototype functions as a reliable and energy favorable electrical device and shed light on the development of effective measurement instruments working under unpredictable and harsh marine environment.

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“…In this study, to enhance our understanding on landslide-induced impulse waves in narrow river-valley reservoir regions, a series of experimental work was conducted. In addition, with the development of CFD technology, more and more research work adopts CFD technology [9][10][11]44], software package FLOW-3D, as a 3D two-phase flow model was applied to systematically study the generation and propagation of landslide-induced surge waves in narrow reservoir river regions at a laboratory scale, and it has been approved to be effective research tools for studies on landslide-induced impulse waves [27][28][29][30][31]. In present paper, 3D experimental data is used to verify the reliability of our 3D numerical model (FLOW-3D).…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Hydrodynamic Characteristics of Landslide-Induced Impulse Waves in Narrow River-Valley Reservoirs

Deng

Jiang

et al. 2020

IEEE Access

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Landslide-induced impulse waves in a river-valley reservoir region have become a serious threat to life and property intactness. Compared with previous studies focusing on landslides in open-water regions, this paper systematically carried out numerical investigations on the hydrodynamic characteristics of landslide-induced impulse waves in narrow river-valley reservoirs by applying software package FLOW3D. To verify the computational reliability of FLOW3D, necessary experimental work was conducted. The predicted temporal evolutions of water elevation at selected wave gauges are in good agreement with that recorded during the corresponding experiment. The effects of some prominent factors, such as the drop height of the slide, still-water depth, slide volume, and slide slope, on the propagation and magnitude of landslide-induced impulse waves are investigated in detail by systematically analyzing both simulation and experimental results. Based on simulation results, we proposed empirical formulas for predicting the landslide-induced impulse waves by performing dimensionless analysis and applying nonlinear regression methods. Then, the proposed empirical formulas were applied to predict the impulse waves induced by four landslide accidents. It is believed that the findings drawn from this paper could greatly enhance our understanding on the hydrodynamic characteristics of landslide-induced impulse waves in narrow river-valley reservoir regions, and the proposed empirical formulas can be used as quick technical support for the safe navigation of such rivers.

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Numerical Analysis of Hydrodynamics Around Submarine Pipeline End Manifold (PLEM) Under Tsunami-Like Wave

Cited by 5 publications

References 24 publications

Numerical Investigation on Generation and Propagation Characteristics of Offshore Tsunami Wave under Landslide

Numerical Investigation on Generation and Propagation Characteristics of Offshore Tsunami Wave under Landslide

An Innovative Multifunctional Buoy Design for Monitoring Continuous Environmental Dynamics at Tianjin Port

Numerical Investigation on Hydrodynamic Characteristics of Landslide-Induced Impulse Waves in Narrow River-Valley Reservoirs

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