Centrifuge simulation of the consolidation characteristics of capped marine sediment beds

Moo-Young, Horace; Myers, Tommy E.; Tardy, Barbara; Ledbetter, Richard; Vanadit-Ellis, Wipawi; Kim, Tae-Hyung

doi:10.1016/s0013-7952(03)00093-0

Cited by 22 publications

(5 citation statements)

References 10 publications

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“…A key shortcoming of this body of research is the absence of definitive experimental data that can be used to validate computational models. Potter et al (1994), Potter et al (1997), andMoo-Young (2003) presented experimental results of contaminant transport in soil specimens undergoing consolidation induced by centrifuge. They concluded that consolidation can accelerate solute migration but failed to present direct correlation between measured transient advective flows (via settlement or excess pore pressure) and solute transport.…”

Section: Introductionmentioning

confidence: 99%

Coupled Consolidation and Contaminant Transport in Compressible Porous Media

2011

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This paper presents an experimental and computational investigation of coupled consolidation and contaminant transport in compressible porous media. Numerical simulations were performed using the CST2 computational model in which a dual-Lagrangian framework is used to separately follow the motions of fluid and solid phases during consolidation. Diffusion and large strain consolidation tests were conducted on composite specimens of kaolinite slurry consisting of an upper uncontaminated layer and a lower layer contaminated with potassium bromide. An assessment of the importance of the consolidation process on solute transport is based on measured and simulated solute breakthrough curves and final contaminant concentration profiles. CST2 simulations closely match the experimental data for several different transport and loading conditions. Both diffusion and consolidation-induced advection made important contributions to solute transport and mass outflow. This study suggests that neglecting to consider transient consolidation effects may lead to significant errors in transport analyses involving soft contaminated clays undergoing large volume change.

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Section: Introductionmentioning

confidence: 99%

Coupled Consolidation and Contaminant Transport in Compressible Porous Media

2011

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“…The selection and proportioning of similar materials were the key to simulating the slope [44,45]. The density of the similar material and the prototype material should be relatively similar to provide a reliable scale for subsequent calculations.…”

Section: Similar Materials Proportioningmentioning

confidence: 99%

Rainfall–Mining Coupling Effects on Slope Failure Mechanism and Evolution Process: A Case Study of Open-Pit to Underground Mining

Li,

Wang,

et al. 2024

Water

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This research examines how rainfall and mining affect the slope damage resulting from the transition from open-pit mining to underground mining. Using an unmanned aerial vehicle (UAV), the Huangniu slope of the Dexing Copper Mine was fully characterized, and experiments were conducted on rock samples from appropriate sites. First, the mechanical properties of the samples were measured. Then, the parameters of the similarity simulation experiments were derived based on the similarity theory. Subsequently, the rainfall, rock slope, data acquisition, and monitoring systems were designed. Finally, the rock mass failure with different slope angles was analyzed, and the deformation and damage patterns under the coupling effect were obtained. The results show that rainfall increases pore water pressure and moisture content. Rainfall and slope-slip water have more of an impact on the open-pit platform. The pore water pressure values on the upper rock mass rise faster than inside it. In the open-pit mining stage, the rock mass shifts slightly to the upper left. In the room mining stage, vertical fractures and goaf sinking occur. The fractures above the mine form a semi-ellipse. In the pillar mining stage, overlying rock displacement is evident and fractures persist. In the continuous pillar mining stage, the overlying rock collapses. The 65° slope model was the most damaged, while the 55° slope model was the least damaged. The results also suggest that the UAV guides sample selection.

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“…They also provide the primary conditions for the construction of major infrastructure, development of deep-sea resource, and research and development of high-performance materials [1][2][3][4]. The largest g-ton capacity centrifuge in at the U.S Army Engineer Research and Development Center (ERDC); it has a maximum payload of 8,000 kg at an acceleration of 143 g and 2,000 kg at an acceleration of 350 g. The maximum capacity of the centrifuge in the ERDC is 1144 gt, maximum acceleration is 350 g, radius is 7 m, and driving motor power is 1200 kW [5]. Zhejiang University and we are currently designing the CHIEF super-gravity geotechnical centrifuge, the world's largest g-ton capacity and most widely applied, multi-disciplinary super-gravity open-source experimental platform.…”

Section: Introductionmentioning

confidence: 99%

A computational fluid dynamic-based method for analyzing the nonlinear relationship between windage loss and pressure in a geotechnical centrifuge

Guo

Yang

et al. 2021

SN Appl. Sci.

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Temperature control is an important limitation to further increase in geotechnical centrifuge power. Although vacuum pumps can reduce windage loss, they also negatively affect heat transfer performance. Therefore, in this study, we aim to accurately determine the rate at which windage loss decreases with pressure to help assess whether reducing pressure is beneficial to temperature control. A computational fluid dynamic method based on the multi-reference model and k–ω shear-stress transport turbulence model is used to simulate the ZJU400gt geotechnical centrifuge. The windage loss and temperature of ZJU400 at 0–150 gravity acceleration under normal pressure conditions are simulated. Compared with the experimental data, the error is < 20.7%, indicating simulation reliability. Furthermore, the simulation model is used to simulate the windage loss power under low-pressure conditions and predict the relationship between the windage loss power and pressure. Compared with current calculation methods, which yield a linear relationship between windage loss and operating pressure, the simulation results indicate a slightly nonlinear relationship. At 5,000 Pa, the simulated windage loss is 40% larger than the calculated value, severely affecting the temperature control design. Moreover, the velocity exhibits minimal variation with pressure, whereas the effective kinematic viscosity varies substantially. The nonlinear relationship between the windage loss and pressure can be attributed to increased turbulent kinetic energy and the size of the wake region caused by vacuum pumping. A formula for nonlinear windage loss with pressure is proposed, providing a basis for the future design of super-gravity geotechnical centrifuges.

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Centrifuge simulation of the consolidation characteristics of capped marine sediment beds

Cited by 22 publications

References 10 publications

Coupled Consolidation and Contaminant Transport in Compressible Porous Media

Coupled Consolidation and Contaminant Transport in Compressible Porous Media

Rainfall–Mining Coupling Effects on Slope Failure Mechanism and Evolution Process: A Case Study of Open-Pit to Underground Mining

A computational fluid dynamic-based method for analyzing the nonlinear relationship between windage loss and pressure in a geotechnical centrifuge

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