A resolved CFDEM algorithm based on the immersed boundary for the simulation of fluid-solid interaction

Jia, Mingxing; Zhao, Lanhao; Liu, Xunnan; Di, Yingtang

doi:10.1016/j.powtec.2020.07.028

Cited by 22 publications

(7 citation statements)

References 44 publications

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“…To the best knowledge of the Authors, this study is the first application of the resolved CFD‐DEM method on suffusion modeling. The accuracy and robustness of resolved CFD‐DEM method in simulating particle–fluid interaction problems have been demonstrated in previous works 36,37 . Its validity will also be examined in this study before its application to suffusion modeling.…”

Section: Introductionmentioning

confidence: 67%

“…The accuracy and robustness of resolved CFD-DEM method in simulating particle-fluid interaction problems have been demonstrated in previous works. 36,37 Its validity will also be examined in this study before its application to suffusion modeling. This study will use the resolved CFD-DEM method to investigate the effect of confining pressure and initial stress anisotropy on the onset of suffusion and the corresponding micromechanisms.…”

Section: Introductionmentioning

confidence: 99%

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A resolved CFD–DEM investigation into the onset of suffusion: effect of confining pressure and stress anisotropy

Chen,

Hu,

Yang

et al. 2023

Num Anal Meth Geomechanics

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The susceptibility of a granular soil to suffusion is strongly dependent on its grain size distribution (GSD) and the mechanical and hydraulic conditions it is subjected to. This study investigates the onset of suffusion considering the effect of confining pressure and stress anisotropy using a fully resolved computational fluid dynamics and discrete element method (CFD–DEM). Three benchmarks, including the sedimentations of single and two adjacent spheres and the classic one‐dimensional (1D) consolidation are performed to demonstrate the capability of this method for high‐fidelity particle‐fluid simulations. A modified hydraulic criterion for the onset of suffusion considering stress anisotropy is presented. The microstructural changes of soil specimens before and during global suffusion are inspected, with emphasis on the evolutions of particle kinetic energy and displacements, force chain networks, and stress anisotropy. We found that the critical hydraulic gradient is negatively correlated with the confining pressure and the degree of stress anisotropy. Fine particles in the soil matrix are locally detached at small hydraulic gradients before the apparent global suffusion, as manifested by the variation of particle kinetic energy and coordination numbers. The roles of different contact types on force transmission and stress anisotropy in eroded specimens are also examined.

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Section: Introductionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

A resolved CFD–DEM investigation into the onset of suffusion: effect of confining pressure and stress anisotropy

Chen,

Hu,

Yang

et al. 2023

Num Anal Meth Geomechanics

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“…By employing direct numerical integration, the method is capable of precisely determining the force of the fluid operating on each particle and analyzing the flow field surrounding each particle [4,5]. Mao employed the IBM method to ascertain the interaction force between fluid and solid within various contexts [6]. In addition, Zhao investigated four discrete IBM imposition methodologies in order to simulate gas-solid flows within cylindrical and immersed fluidized beds, single-phase flow within a stationary cylinder, and single-phase conduit flow.…”

Section: Introductionmentioning

confidence: 99%

Research on the Population Flow and Mixing Characteristics of Pelleted Vegetable Seeds Based on the Bonded-Particle Model

Xu,

Sun,

et al. 2024

Agriculture

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In order to precisely reproduce the precise seeding process of the population in the air-suction seed-metering device, it is necessary to execute accurate modeling of seed particles using the bonded-particle model, in combination with the discrete element method (DEM) and computational fluid dynamics (CFD). Through the repose angle, slope screening, rotating container, and particle sedimentation experiments, in this paper, the influence of the filling accuracy of the bonded-particle model on the flow behavior and mixing characteristics of the seed population was first explored based on EDEM software. The viability of the suggested modeling approach for pelleted vegetable seeds, as described in this study, was confirmed by comparing experimental and simulation outcomes. The surface roughness values obtained from the studies above were utilized to assess the accuracy of the bonded-particle model in filling. Additionally, a mathematical technique for determining the surface roughness was provided. Furthermore, an analysis of the multiple contacts in the bonded-particle model was also performed. The results indicated that the simulation results closely matched the experimental data when the number of sub-spheres in the bonded-particle model was equal to or more than 70, as measured by the standard deviation. In addition, the most optimal modeling scheme for the pelletized vegetable seed bonded-particles, based on the cost of coupling simulation, was found to be the bonded-particle surface roughness (BS) with a value of 0.1. Ultimately, a practical example was utilized to demonstrate the utilization of the pelleted vegetable seed bonded-particle model and the DEM-CFD coupling approach in analyzing the accuracy of the seeding process in the air-suction seed-metering device. This example will serve as a valuable reference point for future field studies.

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“…The whole process of landslide-generated waves can be divided into five stages: the instability of the landslide, their motion, the generation of waves, their propagation, and the effects of the waves on the affected body, which is an interaction with the gas, liquid and solid (Chen et al 2023a, Laurmaa et al 2018, Mao et al 2020, Tan and Chen 2017. Five methods can be adopted to investigate landslide dangers and the catastrophic effects of landslide-induced waves: field analytical investigations, empirical equations, numerical simulations, general physical model tests and prototype physical model tests (Chang and Wang 2011, Fritz et al 2009, Yu et al 2023.…”

Section: Introductionmentioning

confidence: 99%

Large-scale three‑dimensional experimental investigation on potential high landslide‑induced waves in Gushui Reservoir, China

Chen,

Xu,

Feng

et al. 2023

Preprint

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The occurrence of landslides in reservoir areas and the potential secondary disasters near dams are characterized by their sudden and catastrophic nature, often limiting the availability of actual measurement data. To address this challenge, prototype physical model test always proves to be valuable method to replicate or reproduce such geological hazards. In this study, we focused on the Meilishi landslide in the Gushui reservoir area as a case study to analyze the potential threat of high landslide-induced waves under gravity. Based on field investigations and relevant statistical geological data, a large-scale three-dimensional physical model was carried out that integrated the interactions of the landslide, the river, and the dam. With a scale of 1:150, the model had the dimensions of 57, 27, and 8m. Water level and the maximum sliding velocity into the water were selected as independent variables, leading to a total of 18 experiments. An adaptive landslide motion simulation system based on velocity equivalence and a comprehensive measurement system with tracking technology based on hydrodynamics were independently developed. Those approaches allowed us to reveal the propagation characteristics and attenuation laws of high landslide-induced waves in a curved channel under various complex conditions. The data showed that the maximum wave run-up height on damwas 17.97 m under the most dangerous working condition (H3C09). Importantly, this value did not exceed the maximum height of dam, indicating a certain level of safety margin for the dam. Combined with the data of different working conditions, the optimal window for landslide risk prevention and control warnings was within 550 s after the onset of landslide instability. The key parameters predicted by the tests, including head wave height, wave run-up height on the opposite bank, wave run-up height on dam, and the propagation times, provided a technical basis and valuable reference for dam engineering design and safety. These results make significant contributions to the prevention and control of similar surges hazard induced by high landslides around the world.

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A resolved CFDEM algorithm based on the immersed boundary for the simulation of fluid-solid interaction

Cited by 22 publications

References 44 publications

A resolved CFD–DEM investigation into the onset of suffusion: effect of confining pressure and stress anisotropy

A resolved CFD–DEM investigation into the onset of suffusion: effect of confining pressure and stress anisotropy

Research on the Population Flow and Mixing Characteristics of Pelleted Vegetable Seeds Based on the Bonded-Particle Model

Large-scale three‑dimensional experimental investigation on potential high landslide‑induced waves in Gushui Reservoir, China

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