Investigating effect of particle shape on suffusion by CFD-DEM modeling

Xiong, Hao; Wu, Han; Bao, Xiaohua; Fei, Jianbo

doi:10.1016/j.conbuildmat.2021.123043

Cited by 63 publications

(19 citation statements)

References 39 publications

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“…To reduce the influence of the boundary effect, the foundation is widened by 25 m on both sides, and the depth of the soft soil foundation is 30 m. In the finite element model, the soft soil foundation is divided into five layers. As groundwater depth is 10 m, consideration is given to drainage consolidation of the foundation soil below the groundwater level [19]. The cushion thickness is 0.3 m, and the embankment fill's height is in 3-7 m placement in layers.…”

Section: Model Establishment and Parameter Selectionmentioning

confidence: 99%

Research on the Load Transfer Law of Cross-Sections of Pile-Supported Reinforced Embankments Based on the Finite Element Method

Wang

Yang

et al. 2022

Sustainability

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Combining field test research with finite element numerical analysis, this paper studies the mechanical behavior of pile-supported reinforced embankments in soft soil areas. We analyze and compare the variation law of load transfer efficacy at the subgrade center, the right side of the centerline, and the road shoulder; the variations of the load sharing ratios of the soil arching effect and the load sharing ratios of the membrane effect; and the load variation law of wide subgrade cross-sections. Then, the model calculation results are compared with the calculation results of the five theoretical methods and the applicability of the various methods is evaluated. The results show that: increasing the pile length, pile cap width, and embankment height and reducing the pile spacing will increase the pile load transfer efficacy; pile cap width has the greatest influence on the load transfer efficacy; regarding the variation law of the load sharing ratios of subgrade cross-sections, the load-sharing ratio of the soil arch effect at the shoulder is smaller than that at the center of the subgrade, indicating that the deformation of the geogrid at the shoulder is large and the membrane effect is significant; and, regarding the load variation law of subgrade cross-sections, from the subgrade center to the shoulder direction, the pile load transfer efficacy decreases gradually and the load transfer efficacy at the shoulder decreases significantly.

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Section: Model Establishment and Parameter Selectionmentioning

confidence: 99%

Research on the Load Transfer Law of Cross-Sections of Pile-Supported Reinforced Embankments Based on the Finite Element Method

Wang

Yang

et al. 2022

Sustainability

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“…e di erent mixing environments and conditions in which the mixing particles are present also have a signi cant impact on the mixing results [10][11][12]. Particles are important in a variety of industrial applications, including engineering and energy processes.…”

Section: Introductionmentioning

confidence: 99%

Stirring Performance Analysis Based on the Influence of Mechanics and Stirred Mill Environment

Jiang

2022

Mathematical Problems in Engineering

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The stirring performance analysis has great research significance. In this research, we investigate mechanics press and performance in relative frequencies and energies due to interaction forces between particles. The collisions related to media and particle were obtained. Density influence of the model was obtained. The concentration has a relationship with the air and fluid. We investigate air condition at the center of the stirring shaft concentration. In the center of the stirring shaft, air condition velocity vector is relatively smaller than fluid condition. At the collisions between media or particle and the wall, average collision energy in density of air condition was the largest in particle and wall, and average collision energy in different densities was obtained. Air condition has the largest total media and largest total particle average collision energy. We obtained a reasonable stirring model, a suitable stirring density, and working environment for better stirring performance. This research has great significance for the design of mixing products and the research of working environment.

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“…Granular materials, such as sands, gravels, and rock aggregates, comprise particles with various irregular shapes that to a large extent determine the materials' complicated mechanical behaviors and properties. [1][2][3][4][5][6] Different DEM approaches were developed to consider various levels of particle shapes. For instance, for form-scale shape features, ellipses, 7 5626…”

Section: Introductionmentioning

confidence: 99%

“…However, their study was constrained in 2D plane. There are limited studies on exploring the possibility of incorporating the harmonic series into DEM to simulate 3D irregular‐shaped particles 2,6 . Furthermore, Feng et al established a generic contact theory for arbitrary‐shaped particles 32 .…”

Section: Introductionmentioning

confidence: 99%

“…There are limited studies on exploring the possibility of incorporating the harmonic series into DEM to simulate 3D irregular-shaped particles. 2,6 Furthermore, Feng et al established a generic contact theory for arbitrary-shaped particles. 32 Recently, more advanced algorithms were proposed by Feng 33,34 to ensure that the energy is conserved for elastic impact, leading to robust simulations of real problems involving arbitrarily-shaped particles.…”

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confidence: 99%

See 1 more Smart Citation

A spherical‐harmonic‐based approach to discrete element modeling of 3D irregular particles

Wang

Yin

Xiong

et al. 2021

Numerical Meth Engineering

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Different from previous discrete element methods (DEM), where irregular 3D particle shapes are approximated by subspheres, vertices, or voxels, this study aims to develop an innovative and computationally effective DEM method directly employing spherical harmonic functions for simulations of 3D irregular-shaped particles. First, the discrete surface points of a 3D irregular-shaped particle are represented by spherical harmonic functions with only a limited number of harmonic coefficients to restore the particle morphology. Then, the intrinsic physical quantities are computed directly using spherical harmonic functions. Next, specific algorithms for interparticle overlapping detection and contact resolution involving the spherical harmonic functions are developed. Subsequently, the interparticle contact forces, moments, and particle movements are computed. The feasibility and capability of the proposed 3D method are verified by simulating random deposition of superellipsoids, repose angle tests, and triaxial tests on particles with various shapes. The proposed method could pave a viable pathway for realistic modeling of granular media pertaining to various engineering and industrial processes. K E Y W O R D Scomputational particle mechanics, contact detection and resolution, discrete element method, irregular-shaped particles, spherical harmonics INTRODUCTIONGranular materials, such as sands, gravels, and rock aggregates, comprise particles with various irregular shapes that to a large extent determine the materials' complicated mechanical behaviors and properties. [1][2][3][4][5][6] Different DEM approaches were developed to consider various levels of particle shapes. For instance, for form-scale shape features, ellipses, 7 5626

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Investigating effect of particle shape on suffusion by CFD-DEM modeling

Cited by 63 publications

References 39 publications

Research on the Load Transfer Law of Cross-Sections of Pile-Supported Reinforced Embankments Based on the Finite Element Method

Research on the Load Transfer Law of Cross-Sections of Pile-Supported Reinforced Embankments Based on the Finite Element Method

Stirring Performance Analysis Based on the Influence of Mechanics and Stirred Mill Environment

A spherical‐harmonic‐based approach to discrete element modeling of 3D irregular particles

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