SPH-FE-Based Numerical Simulation on Dynamic Characteristics of Structure under Water Waves

Yang, Yilin; Li, Jinzhao

doi:10.3390/jmse8090630

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…In recent years, SPH has been widely utilized to simulate a wide range of coastal and ocean engineering applications, such as solitary waves on beaches [51], breaking waves [52][53][54][55], wave-structure interaction and impact on coastal structures [45][46][47][56][57][58][59][60], and wave overtopping on offshore platforms [61]. Although the SPH method is one of the most matured forms of meshless techniques for cases of large deformations, such as during the breaking process of a wave, the computational accuracy and efficiency in simulating small deformation of solid bodies are lower than that of the FEM approach [62]. However, in the context of coastal structures and their dynamic response to large wave loads, the hybrid SPH-FEM approach could be utilized to take advantages of the ability of: (a) the SPH method to simulate complex free-surface flows and large fluid deformations, and (b) the FEM to simulate the dynamics of the structure [63,64].…”

Section: Introductionmentioning

confidence: 99%

Coupled SPH–FEM Modeling of Tsunami-Borne Large Debris Flow and Impact on Coastal Structures

Hasanpour

Istrati

Buckle

2021

JMSE

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Field surveys in recent tsunami events document the catastrophic effects of large waterborne debris on coastal infrastructure. Despite the availability of experimental studies, numerical studies investigating these effects are very limited due to the need to simulate different domains (fluid, solid), complex turbulent flows and multi-physics interactions. This study presents a coupled SPH–FEM modeling approach that simulates the fluid with particles, and the flume, the debris and the structure with mesh-based finite elements. The interaction between the fluid and solid bodies is captured via node-to-solid contacts, while the interaction of the debris with the flume and the structure is defined via a two-way segment-based contact. The modeling approach is validated using available large-scale experiments in the literature, in which a restrained shipping container is transported by a tsunami bore inland until it impacts a vertical column. Comparison of the experimental data with the two-dimensional numerical simulations reveals that the SPH–FEM models can predict (i) the non-linear transformation of the tsunami wave as it propagates towards the coast, (ii) the debris–fluid interaction and (iii) the impact on a coastal structure, with reasonable accuracy. Following the validation of the models, a limited investigation was conducted, which demonstrated the generation of significant debris pitching that led to a non-normal impact on the column with a reduced contact area and impact force. While the exact level of debris pitching is highly dependent on the tsunami characteristics and the initial water depth, it could potentially result in a non-linear force–velocity trend that has not been considered to date, highlighting the need for further investigation preferably with three-dimensional models.

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Section: Introductionmentioning

confidence: 99%

Coupled SPH–FEM Modeling of Tsunami-Borne Large Debris Flow and Impact on Coastal Structures

Hasanpour

Istrati

Buckle

2021

JMSE

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“…While the SPH method is advantageous in dealing with fluids and large deformation problems, this dynamic meshless technique is much less efficient in dealing with static and small deformation problems of solid bodies than FEM [2,88]. The combination of SPH and FEM methods is thus a natural choice to deal with the dynamic interaction between fluid and infrastructures.…”

Section: Numerical Codementioning

confidence: 99%

Numerical Investigation on the Impact of Tailings Slurry on Catch Dams Built at the Downstream of a Breached Tailings Pond

Zhou

2022

Processes

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Tailings storage facilities (TSFs) are known as a time-bomb. The numerous failures of TSFs and the heavy catastrophic consequences associated with each failure of TSFs indicate that preventing measures are necessary for existing TSFs. One of the preventing measures is to construct catch dams along the downstream near TSFs. The design of catch dams requires a good understanding of the dynamic interaction between the tailing slurry flow and the catch dams. There are, however, very few studies on this aspect. In this study, a numerical code, named LS-DYNA, that is based on a combination of smoothed particle hydrodynamics and a finite element method, was used. The numerical modeling shows that the tailings slurry flow can generally be divided into four stages. In terms of stability analysis, a catch dam should be built either very close to or very far from the TSF. When the catch dam with an upstream slope of a very small inclination angle is too close to the tailings pond, it can be necessary to build a very high catch dam or a secondary catch dam. As the impacting force can increase and decrease with the fluctuations back-and-forth of the tailing slurry flow, the ideal inclination angle of the upstream slope of the catch dam is between 30° and 37.5°, while the construction of a catch dam with a vertical upstream slope should be avoided. However, a catch dam with steeper upstream slopes seems to be more efficient in intercepting tailings flow and allowing the people downstream more time for evacuation. All these aspects need to be considered to optimize the design of catch dams.

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“…incompressible flow at low Reynolds numbers (Morris, 1997), nonlinear shoaling process over the surf zone (Cho and Lee, 2007), predicting wave forces on coastal structures (Dalrymple, 2000: Gomez-Gesteira et al, 2005: Gong et al, 2016: Pan et al, 2016, and the dynamic response of a floating structure to the impact of incoming waves (Yang and Li, 2020). The wealth of experience and insights gathered from a range of applications has played a pivotal role in reshaping smoothed particle hydrodynamics (SPH) into a versatile and comprehensive numerical method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Nonlinear Shoaling Characteristics in the Surf and Swash Zones: Spatially Averaged Navier–Stokes Equations with Lagrangian Dynamic Smagorinsky Model and SPH

Cho,

Kim

2024

Preprint

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As part of an effort to develop a phase-resolving wave driver and establish a robust foundation for a comprehensive morphology model capable of describing the year-long circulation process of sandy beaches and addressing beach erosion, the authors introduced a wave driver comprising the spatially averaged Navier–Stokes equations. To verify the newly proposed wave driver, the authors numerically investigated the nonlinear shoaling characteristics of the surf and swash zones. The authors also tested the validity of the eddy viscosity model for Reynolds stress due to wave breaking using data from the Super Tank Laboratory Data Collection Project (Krauss et al., 1992). The characteristic length scale of the breaking-induced current is not negligible, posing a clear contradiction to the applicability of widely used eddy viscosity models, such as the, and instead favoring large eddy simulation (LES) with finer grids. In light of these observations, the residual stress in the spatially averaged Navier‒Stokes equation is modeled based on the Lagrangian dynamic Smagorinsky approach (Meneveau et al., 1996). The authors numerically integrate newly proposed wave driver using SPH with a Gaussian kernel function. A severely deformed free water surface profile, free-falling water particles from the wave crest, queuing splashes after water particles land on the free surface, and wave fingers resulting from structured vortices on the up-wave side of the wave crest (Narayanaswamy and Dalrymple, 2002) are successfully duplicated in the numerical simulation of wave propagation over a uniform slope beach: these features have been regarded as very difficult to duplicate in computational fluid mechanics. The numerical simulation also indicates that the widely used Standard Smagorinsky model with in the literature results in an excessively dampened water surface profile, attributed to the overestimated energy dissipation from wave breaking, leading to the loss of picturesque features, such as reverse breaking, observed both in nature and in numerical simulations using the Dynamic Smagorinsky model. Furthermore, the bottom shearing stress was estimated using the numerically simulated velocity profile and dynamic Smagorinsky coefficient, rather than relying on the quadratic friction law with a friction coefficient, as in the literature. The observation revealed that the maximum bottom shearing stress occurred when a broken wave, commonly known as a bore, rushed into the deep swash zone. Additionally, the study demonstrated that every aspect of the evolution of bottom shear stress within a wave period, such as its asymmetric nature over the surf zone where most of the sediment available along the beach is activated, could be precisely simulated using the newly proposed wave driver. These features of bottom shear stress over the surf and swash zones are crucial prerequisites for a morphology model to accurately describe the year-long circulation process of sandy beaches and effectively address beach erosion. This is particularly important, as the seasonal migration of an offshore bar is closely related to asymmetrically accelerated flows.

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SPH-FE-Based Numerical Simulation on Dynamic Characteristics of Structure under Water Waves

Cited by 7 publications

References 31 publications

Coupled SPH–FEM Modeling of Tsunami-Borne Large Debris Flow and Impact on Coastal Structures

Coupled SPH–FEM Modeling of Tsunami-Borne Large Debris Flow and Impact on Coastal Structures

Numerical Investigation on the Impact of Tailings Slurry on Catch Dams Built at the Downstream of a Breached Tailings Pond

Numerical Analysis of Nonlinear Shoaling Characteristics in the Surf and Swash Zones: Spatially Averaged Navier–Stokes Equations with Lagrangian Dynamic Smagorinsky Model and SPH

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