... ABSTRACT Sediment incipient motion is the first stage of the whole process of local scour around a marine infrastructure. Most previous investigations ignored seepage flow on the mobility of bed particles except a recent study including the effects of vertical seepage flow in the prediction...

..., using a new fluid-particle drag force model considering the effects of particle shape and flow regimes, the CFD-DEM model is more powerful to simulate the fluid seepage flow behaviour within natural sand such as calcareous sand of irregular-shaped particles. The applications of the developed CFD-DEM...

... ABSTRACT This paper presents and evaluates a new reinforcement technique, based on the use of rubber sheets and Permex blocks to negate the effects of tsunami-induced instabilities (seepage flow and scouring) on a caisson type composite breakwater. In this study, a series of hydraulic model...

... ABSTRACT. In order to improve the stability of breakwater due to tsunami-induced overflow and seepage flow, it is effective that putting armor blocks on the harbor-side mound of breakwater. A hydraulic model experiment for the model of Kamaishi Bay breakwaters under tsunami condition...

... skirt normalized seepage length seepage flow gradient seepage length simulation soil resistance suction soil case upstream oil & gas hydraulic gradient impermeable layer reservoir characterization exit hydraulic gradient Seepage 6tudy for 6uction ,nstallation of %ucket )oundation...

... Abstract An accurate knowledge of seepage flows through embankments is necessary for the stability analysis and drainage computation. In this paper, a particle-based MPM model with two sets of material points is used to study the phenomenon. Before simulating the seepage flow through...

... collapse mechanism and 2) investigate the effect of countermeasure by placing the embankment over the breakwater foundation mound using rubble materials and filter units. The study found that the caisson failure was due to the scouring of rubble mound and the seepage flow. Moreover, placing the embankment...

... Coupled CFD-DEM Simulation of Upward Seepage Flow in Granular Media Yin Wang1; Jun Ai2 1State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology Dalian, 116023, China 2INTECSEA, Woking, Surrey, U.K. ABSTRACT A numerical model for analyzing microscopic fluid flow...

... of the cofferdam, the various flow conditions due to the above situations should be specified correctly, and the critical hydraulic head difference against seepage failure, Hc, must be estimated exactly. In this paper, the characteristics of seepage flow and seepage failure of soil under various flow conditions...

...) equations with a k-w turbulence model closure. The onset condition for scour is defined as the moment when the seepage flow pressure gradient at any point in the seabed blow the pipeline exceeds the floatation gradient of the seabed soil. In this numerical model, the average seepage pressure gradient along...

... equations, thereafter the seepage flow in the soil is calculated with the obtained pressure drop as the boundary conditions along the soil surface. Numerical results indicate that the seepage failure (or piping) may occur at the exit of the seepage path when the pressure gradient gets larger than...

... ABSTRACT It is well known that seepage flow plays a key role in assisting suction installation of caissons in sand. By loosening sand along the caisson's inner wall and at the wall tip, the flow significantly reduces the soil resistance. At the same time, this can also create plug loosening...

... ABSTRACT Seismic response and stability of breakwaters under seepage flows is studied in this paper. A series of model tests on the shaking table are performed to investigate the dynamic response and failure mechanism. A simplified method to determine the dynamic stability of slope protection...

... ABSTRACT: This paper presents the study of the irregular wave induced seepage force on the bottom of a circular cylinder resting on seabed. The seabed is assumed to be a porous elastic medium, and the seepage flow in it is assumed to be Darcy's flow. The Transfer Function Method is used...