The Use of Simulation Software using the Discrete Element Method (DEM) for the Process of Materials Comminution

Kruszelnicka, Weronika; Macko, Marek; Łączny, Daniel; Bałdowska-Witos, Patrycja; Lewandowski, Jakub

doi:10.1051/matecconf/202235707005

Cited by 4 publications

(2 citation statements)

References 61 publications

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“…The contact models used in the DEM simulations were Hertzian Spring Dashpot for normal forces and Mindlin-Deresiewitcz for tangential forces. Hertzian Spring Dashpot is used for modelling non-linear materials, and Mindlin-Deresiewicz can be used only with the Hertzian Spring Dashpot model (Kruszelnicka et al 2022). Cohesion is negligible in a dry state.…”

Section: Methodsmentioning

confidence: 99%

Comparison of experimental and numerical results on flow uniformity of seeds transmitted from the studded feed roller

Boydas

2024

Res. Agric. Eng.

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Studded feed rollers are widely used in seed metering units of seed drills. The flow evenness is an important indicator of the performance of studded feed rollers. With this research, the effects of studded feed rollers with different stud numbers (27, 36, and 45 studs) on flow evenness were investigated both in the laboratory and by simulation in case of using different ground speeds (1.5, 2, and 2.5 m⋅s -1 ). While the experiments were carried out on the seed drill model prepared in the laboratory, the simulation was done with the Rocky DEM software program. In the laboratory and simulation studies, it was determined that the flow evenness increased with the increase in the number of studs and the ground speed. The results obtained from the laboratory and simulation studies show parallelism with each other. However, it was seen that the results obtained in the laboratory were slightly higher than the results obtained from the simulation. With this study, it has been seen that it would be very beneficial to use the DEM model to improve the performance of the seed metering unit and to develop a new seed metering unit.

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Section: Methodsmentioning

confidence: 99%

Comparison of experimental and numerical results on flow uniformity of seeds transmitted from the studded feed roller

Boydas

2024

Res. Agric. Eng.

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“…There is also a lack of a complete physical model, which prevents the analysis of the design of the technical system with the parameters of the dosing technological process. Kruszelnicka et al [29] used DEM to model the grinding process to prove the abstraction of some parameters of the physics of the process. Karwat et al [30] pointed out that when modeling the flow of bulk materials, it is important to correctly calibrate the input parameters on a macro scale; that is, it is more important to reflect the behavior of the entire mixture flow than the dependence between individual particles.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Efficiency of the Centrifugal Conical Disk Dispenser of Bulk Materials

Dmytriv,

Bembenek,

Banha

et al. 2024

Materials

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Centrifugal disk dispensers are widely used in various tasks of dosing bulk, dispersed materials. The design of the disk depends on the physical and mechanical characteristics of the dosing medium. The work discusses the development of an analytical model of the movement of a material particle along a conical centrifugal disk depending on the kinematic characteristics of the dosing process and the characteristics of the dosing material, as well as experimental confirmation of the theoretical model, which is relevant for the calculation and design of working elements of this type. The obtained system of differential equations is solved using the Runge–Kutta numerical method. Experimental studies were carried out using the method of a planned factorial experiment. The experiment was conducted for three factors at three levels. The feedback criterion was the performance of a centrifugal conical disk dispenser for bulk materials. The disk cone angle was set at 10, 20, and 30°. The disk diameter was 130, 150, and 170 mm, the gap between the disk and the edge of the hopper neck was 6, 8, and 10 mm, and the rotational speed of the conical disk was 0.65, 1.02, and 1.39 rad/s. The dispensing rate of the dispenser ranged from 15 to 770 g/s, depending on the values of the experimental factors. For use in the regression equation of the natural values of the factors, a method of transforming the terms of the equation from coded values to natural ones is provided. The obtained experimental correlation dependencies were checked for reproducibility with Cochrane’s test, and the adequacy of the model was checked using Fisher’s test. The significance of the coefficients in the correlation equation was evaluated using the Student’s t-test. The difference between the experimental data and the results of the theoretical modeling does not exceed 5%. The obtained system of differential equations makes it possible to model the radial velocity of the ascent of bulk material from the conical rotating disk depending on the rotation frequency, disk diameter, and the height of the annular gap between the discharge throat of the hopper and the conical disk. The analytical model enables the modeling of the productivity of the conical dispenser for bulk materials for arbitrary parameters of rotation frequency, disk diameter, and the size of the annular gap between the discharge throat of the hopper and the conical disk.

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The restitution coefficient of a particle repeatedly bouncing off a rough surface

Abutuqayqah,

El hor,

Saleem

2024

Chaos, Solitons & Fractals

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The Use of Simulation Software using the Discrete Element Method (DEM) for the Process of Materials Comminution

Cited by 4 publications

References 61 publications

Comparison of experimental and numerical results on flow uniformity of seeds transmitted from the studded feed roller

Comparison of experimental and numerical results on flow uniformity of seeds transmitted from the studded feed roller

Modeling of the Efficiency of the Centrifugal Conical Disk Dispenser of Bulk Materials

The restitution coefficient of a particle repeatedly bouncing off a rough surface

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