Virtual Experiments of Particle Mixing Process with the SPH-DEM Model

Zhu, Siyu; Wu, Chunlin; Yin, Huiming

doi:10.3390/ma14092199

Cited by 11 publications

(4 citation statements)

References 66 publications

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“…They found that mixing homogeneity is highly dependent on liquid content, and a transition to viscoplastic behavior occurs at a critical liquid content. Zhu et al [15] focused on the high-shear mixing process of a granular flow containing a high proportion of solid particles in a liquid. Their study demonstrated that a higher moisture content tends to slow down the mixing process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Effect of Aggregate Moisture on Mixing Process

Cao,

Xie,

Deng

et al. 2024

Materials

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During the concrete mixing process, the transition of aggregates from a dry to a moist state introduces a crucial dynamic that significantly influences particle interaction, consequently impacting mixing homogeneity. In this paper, based on the discrete element method, the effect of aggregate moisture on the mixing process of sand and stone was investigated. The interaction between dry particles was described by the Hertz–Mindlin model, while the interaction between wet particles was calculated by the linear cohesion model considering the liquid bridge force. Additionally, a functional relationship between the moisture content and the parameters of the linear cohesive contact model was established. The results show that the numerical method can be employed to simulate the mixing process. Notably, when the moisture content of pebbles ranges from 0% to 0.75% and that of sand ranges from 0% to 10.9%, the linear cohesion model is deemed suitable. The standard deviation of the mixing homogeneity of wet particles is lower than that of dry particles for short mixing time, indicating that a small amount of liquid enhances mixing homogeneity. However, moisture has no obvious effect on mixing homogeneity for a long mixing time. This nuanced understanding of the interplay between moisture, particle interactions, and mixing duration contributes valuable insights to optimize concrete mixing processes.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Effect of Aggregate Moisture on Mixing Process

Cao,

Xie,

Deng

et al. 2024

Materials

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“…Concrete is the largest material and part used in building construction [1], and its quality has a significant impact on the quality of building construction [2], such as bridges, airports, roads, and military defenses. Concrete is usually made of coarse aggregate, gravel [3,4], cement, and other materials in appropriate proportions, relying on a horizontal shaft mixing device and the selection of appropriate mixing parameters [5][6][7] to complete its mixing production process. Therefore, the quality of concrete often depends on various factors such as device structural parameters, mixing parameters, and material characteristics during the mixing process [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Shen,

Wang,

Hou

et al. 2024

Materials

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The shape of coarse aggregate is an important factor determining the performance of concrete, and it also affects the whole mixing process. This article selected four typical coarse aggregates and simulated the motion behavior of the coarse aggregate and mortar in a dual horizontal axis mixer using discrete element software, EDEM. The mixing motion of coarse aggregates with different shapes and mortar was studied using average velocity, contact rate, and dispersion coefficient as indicators. The results show that the largest average speed in the mixing process was achieved with the spherical coarse aggregate. Flat coarse aggregates have the highest velocity in the vertical direction, while ellipsoidal coarse aggregates have the lowest velocity. The spherical coarse aggregate mixes best with mortar while the ellipsoidal coarse aggregate mixes worst with mortar. The results of the study could provide strategies for the concrete mixing process considering the shape of the aggregate.

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“…Several studies, in which the authors compare the results obtained by the above methods, are available [26][27][28][29][30][31][32][33]. Taking into account that due to the bird strike, large deformations to the bird occur, the mesh-less SPH method is the most suitable [34][35][36]. The SPH technique was used in numerical methods to avoid the constraints related to the distortion of the finite element mesh when solving problems with strong deformations.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations of Bird Models for Bird Strike Analysis

2022

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The article presents experimental and numerical studies of bird models during impacts with rigid and deformable targets. The main aim of the studies is the validation of bird models in order to prepare them for the numerical simulation of bird impact against aircraft windshields and other parts of aircraft, thus improving the air transportation safety by providing cost-effective solutions for designing bird strike-resistant aircraft. The experimental investigations were conducted with a special set-up of a gas gun equipped with high-speed cameras, tensiometers and force sensors. The simulations were developed on the basis of LS-DYNA software by means of the SPH method for the bird model shape of the cylinder with hemispherical endings at the speed of 116 m/s. The results of studies into such things as the impact force, pressure and bird model deformation were compared. Moreover, the authors’ and other researchers’ results were assessed. It can be noted that the curves of the impact force obtained as a result of the numerical analysis correlated well with the experimental ones.

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Virtual Experiments of Particle Mixing Process with the SPH-DEM Model

Cited by 11 publications

References 66 publications

Numerical Study on Effect of Aggregate Moisture on Mixing Process

Numerical Study on Effect of Aggregate Moisture on Mixing Process

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Experimental and Numerical Investigations of Bird Models for Bird Strike Analysis

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