Discrete element simulation on mixing of granular materials in rotated container

Zhang, Zhixiong; Wang, Lian; Wang, Yanran; Chu, Xihua

doi:10.1016/j.enganabound.2019.04.034

Cited by 14 publications

(2 citation statements)

References 17 publications

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“…They reported that a slow rotation speed could enhance the mixing performance due to more time required for developing a stratification structure. Zhang et al 6 also used DEM to study particle mixing by 2D simulation. It was found that increasing the rotation speed can accelerate the mixing process at low rotation speeds.…”

Section: Introductionmentioning

confidence: 99%

A Discrete Element Method Study of Monodisperse Mixing of Ellipsoidal Particles in a Rotating Drum

Gan

Pinson³

et al. 2020

Ind. Eng. Chem. Res.

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Rotating drums are widely used in the industry for mixing, milling, coating, and drying processes. In the past decades, mixing of granular materials in rotating drums has been extensively investigated, but most of the studies are based on spherical particles. Particle shape has a significant effect on the flow behavior and thus mixing performance, but studies and understanding are still limited. In this work, discrete element method is employed to study the radial mixing of ellipsoids in a rotating drum. The effects of rotation speed and aspect ratio of ellipsoids on mixing quality and rate are investigated, and the underlying mechanisms are further developed. The results show that mixing index increases rapidly over time for both spheres and ellipsoids. Particles with various shapes of ellipsoids can reach wellmixed states after sufficient revolutions. The increase in rotation speed decreases the mixing rate for both spheres and ellipsoids. Generally, ellipsoids exhibit a higher mixing rate when the rotational speed ranges between 25 and 40 rpm. At 40 rpm, as the aspect ratio of ellipsoids deviates from 1.0, the mixing rate increases significantly and achieves the maximum when the aspect ratio is 0.75 or 1.5. A further increase in particle non-sphericity incurs a decrease in mixing rate. The increase in the deviation of aspect ratio from 1.0 contributes to stronger "slipping" of particles relative to the drum wall. Compared with ellipsoids, spheres have stronger diffusive mixing and weaker convective mixing in rolling or cascading regimes.

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Section: Introductionmentioning

confidence: 99%

A Discrete Element Method Study of Monodisperse Mixing of Ellipsoidal Particles in a Rotating Drum

Gan

Pinson³

et al. 2020

Ind. Eng. Chem. Res.

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show abstract

“…According to different means of describing weak planes, existing numerical methods are divided into continuous medium methods (CMMs) and discrete element methods (DEMs). In contrast to the CMM (Cai, 2013;Zeng and Wei, 2016), DEM procedure is able to intuitively embody the weak planes, where the initiation and propagation of fractures can be obtained explicitly without applying complex constitutive laws (Bennett et al, 2015;Park and Min, 2015;Wang et al, 2018;Zhang et al, 2019). In addition, considering the small scale (e.g., diameter of 50 mm) of the specimens, the particle DEM, e.g., particle flow code (PFC), is widely used to describe the gradual failure of rocks and the microscopic mechanisms underlying rock deformation behaviour Jia et al, 2017).…”

Section: Made Triaxial Compression Tests Onmentioning

confidence: 99%

Mutual interference of layer plane and natural fracture in the failure behavior of shale and the mechanism investigation - A numerical study

Zhao¹,

Xie²,

Fan³

et al. 2019

Preprint

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• PFC-based numerical model are conducted to simulate the failure behavior of layered shale with natural fracture under Brazilian tests. • Complex interference of layer plane and natural fracture in failure strength and fracture pattern of shale are clarified. • Damage modes, micro cracks and sensitivity of tensile/cohesion strength are recognized quantitatively during loading/failure process.

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SIPHPM simulation and analysis of cubic particle mixing in a tilted tumbler and application of a new mixing index construction principle

Zhang,

Gui,

Yang

et al. 2024

Comp. Part. Mech.

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Discrete element simulation on mixing of granular materials in rotated container

Cited by 14 publications

References 17 publications

A Discrete Element Method Study of Monodisperse Mixing of Ellipsoidal Particles in a Rotating Drum

A Discrete Element Method Study of Monodisperse Mixing of Ellipsoidal Particles in a Rotating Drum

Mutual interference of layer plane and natural fracture in the failure behavior of shale and the mechanism investigation - A numerical study

SIPHPM simulation and analysis of cubic particle mixing in a tilted tumbler and application of a new mixing index construction principle

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