Recent progress on the discrete element method simulations for powder transport systems: A review

Shi, Qi; Sakai, Mikio

doi:10.1016/j.apt.2022.103664

Cited by 26 publications

(9 citation statements)

References 172 publications

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“…This makes it possible to determine their influence on the horizontal movement of particles due to inertial forces. In contrast to the results reported in works [6,[8][9][10][11][12][13], the developed computer models make it possible to determine the trajectories of particle movement inside the tubular-comb feeders. They make it possible, based on the design and technological parameters of such feeders, to calculate their performance and determine the magnitude of pulsations in the flow of loose materials.…”

Section: Discussion Of Results Of Investigating the Magnitude Of Puls...mentioning

confidence: 93%

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Determining the pattern of loose material movement in screw and tubular-comb feeders

Nychehlod,

Burmistenkov,

Statsenko

et al. 2023

EEJET

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The object of this study is the relationship between the structural and technological parameters of feeders for loose materials and the characteristics of particle flows at their outlet, namely: productivity and the magnitude of pulsations. The existing designs of this type of equipment were analyzed, and the most common methods for simulating their operation were determined. A structure of a tubular-comb feeder has been proposed, the performance of which is compared with the well-known screw feeder. Computer models of both structures were built based on the discrete element method. The simulation was carried out in the EDEM 2017 software environment. It was established that the resulting models take into account the discrete nature of the movement of loose materials and allow conducting research taking into account the physical and mechanical properties of individual particles. An experimental bench was fabricated for experimental verification of the modes of operation of the tubular-comb feeder. The performance of this type of feeder was determined for two pipe rotation speeds (6 and 10 rad/s). The amount of material flow pulsations in the outlet nozzle was also determined. The correspondence of the results of calculations based on the computer model to the real process was confirmed. The current study was carried out the steady modes of operation. It was established that with equal overall dimensions and speeds of rotation of the working bodies, the productivity of the screw feeder is 5...5.2 times greater than that of the tubular-comb feeder. But the latter provides 7.3...16.4 times smaller magnitude of pulsations of the flow of loose material. This makes it possible to reduce the heterogeneity of mixtures, especially in the case of using such feeders as part of continuous mixing systems. The results make it possible to analyze the operation of bulk material feeders and reduce their design time

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Section: Discussion Of Results Of Investigating the Magnitude Of Puls...mentioning

confidence: 93%

“…A comprehensive review of DEM use in the research of systems for transporting powder materials is given in [13]. Particular attention is paid to electrification of powder during pneumatic transportation, erosion on pipe bends, transportation of non-spherical particles.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the pattern of loose material movement in screw and tubular-comb feeders

Nychehlod,

Burmistenkov,

Statsenko

et al. 2023

EEJET

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“…The principle behind the accurate description of gas-solid migration and collision lies in whether it is necessary to build an appropriate simulation environment and analyze the gas-solid coupling effect. No matter whether the material-free airflow field numerical analysis or airflow-free particle simulation analysis is used exclusively, research on the winnowing process still has certain limitations ( Shi and Sakai, 2022 ). Therefore, in this paper, EDEM software was used to establish a walnut-crushing material model and Fluent in ANSYS software was used to simulate and analyze the fluid in the air separation chamber.…”

Section: Methodsmentioning

confidence: 99%

Technological parameter optimization for walnut shell-kernel winnowing device based on neural network

Tang²,

Zhang³

et al. 2023

Front. Bioeng. Biotechnol.

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The detection method for technological parameter is outdates as the traditional test cycle is long as well as the measurement error and the test amount are huge. Moreover, it is difficult to disclose the operation mechanism of devices as the operation is time-consuming and laborious. Therefore, numerical simulation was used in this study to reveal the mechanism of the walnut shell-kernel winnowing device. Moreover, the influence of baffle opening combinations, inlet wind velocity and inlet angle on cleaning rate and loss rate was predicted by the neural network model. The results demonstrated that inlet wind velocity was the primary influencing factor of cleaning rate, followed by baffle opening and inlet angle. Besides, inlet wind velocity was the primary influencing factor of loss rate, followed by inlet angle and baffle opening. The winnowing device performed best (79.91% cleaning rate, 14.37% loss rate) when the baffle opening, inlet wind velocity and inlet angle were 7.01 cm, 24.36 m/s, and 9.47°. In addition, 1/8 walnut shells and 1/4 walnut kernels were incorrectly classified due to the increase in inlet wind velocity. The inlet wind velocity was considered the major cause behind the deteriorating winnowing performance of the device. Finally, the bench test and simulation optimization results were compared. The cleaning rate and loss rate relative error during the simulation test was lower than 1.06%, which ascertained the feasibility and validity of the neural network as well as the combined numerical simulation method. This study could be useful for future research and development of shell-kernel winnowing devices for hard nuts.

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“…Currently, there has been a lot of research work focused on developing a numerical method for the pneumatic conveying of granular materials [21][22][23][24][25][26][27]. One of the commonly used approaches is the Eulerian/Lagrangian method, where particles are tracked in a Lagrangian frame of reference either individually or as groups with identical properties [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the discrete element method (DEM), has been successfully applied [31]. Several research workers have also applied the approach of combining DEM with CFD [21,25,26].…”

Section: Introductionmentioning

confidence: 99%

Numerical Method for System Level Simulation of Long-Distance Pneumatic Conveying Pipelines

Zhou

Fang

2022

Mathematics

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Pneumatic conveying pipelines (PCPs) provide an effective manner for long-distance transport of capsules because of their advantages in high speed, superior safety, and full automation. For better development of PCPs, a system-level simulation tool is desired, but not yet available. In this work, a new 1D model describing systemic dynamics of airflow and capsule movement in PCPs is presented, and 3D simulation is proposed to obtain the characteristic coefficients in the 1D model. The complete model accounts for those phenomena that most profoundly affect the performance of PCPs, such as the 3D layout of the pipeline, the geometry of capsules, as well as the compressibility of air in a long pipeline. A finite volume method is also presented to numerically calculate the model equations, and thereby realize the successful system-level simulation of practical PCPs for the first time. Experimental data were used for validation. For a 550 m-long and small-diameter (27.86 mm) PCP, the errors of predicted conveying times were within 4.43%. For another 30 m-long and large-diameter (125.6 mm) PCP, the errors of predicted conveying time and maximum capsule velocity were within 1%. By enabling readily and accurate prediction of the conveying process, the method provides a feasible tool for the design and application of PCP systems.

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Recent progress on the discrete element method simulations for powder transport systems: A review

Cited by 26 publications

References 172 publications

Determining the pattern of loose material movement in screw and tubular-comb feeders

Determining the pattern of loose material movement in screw and tubular-comb feeders

Technological parameter optimization for walnut shell-kernel winnowing device based on neural network

Numerical Method for System Level Simulation of Long-Distance Pneumatic Conveying Pipelines

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