Experiment and simulation analysis of the suspension behavior of large (5–30 mm) nonspherical particles in vertical pneumatic conveying

Yang, Dong‐Yeol; Bang-sheng, Xing; Li, Jianping; Wang, Yanxiang; Hu, Ningning; Jiang, Shoubo

doi:10.1016/j.powtec.2019.06.023

Cited by 38 publications

(17 citation statements)

References 42 publications

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“…To simulate the effect of particle shape on gas–solid two-phase interactions, a number of approaches to create irregular particles using the DEM method have been reported. − , Some of these approaches focus on the irregular particle shape modeling method, and others focus on irregular agglomerate internal fragmentation. In the present work, the influence of particle shape on the particle pickup process is mainly discussed.…”

Section: Methodologiesmentioning

confidence: 99%

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Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Zhou

Shangguan

Gao

et al. 2020

Ind. Eng. Chem. Res.

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The pickup characteristics of lump non-spherical particles in an oscillating airflow were numerically studied on the basis of experimental verification. Five typical shapes of lump coal particles with diameters of 5−7 mm were numerically calculated. The impact of the oscillating amplitudes and the frequencies was discussed. The oscillating number was first defined to quantitatively examine the oscillating intensity. Two points are worth highlighting: (1) the increase in the particle pickup ratio caused by the strength interaction intensity mostly prioritized the particle pickup process in an oscillating airflow. Particles were liable to be entrained, but this process was weakened in the continuous pickup process in a high-frequency rectangular wave airflow. (2) A significant consistent regression relationship was observed in both the swirling airflow and oscillating airflow in which the particle pickup velocity increases at first and then decreases with both the oscillating number and swirling number.

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Section: Methodologiesmentioning

confidence: 99%

“…With the wide application of this method in the chemical industry, studies utilizing fly ash and laboratory materials such as glass beads, sand, and plastic pellets have limitations. Thus, many researchers have recently paid more attention to lump non-spherical materials. ,,− …”

Section: Introductionmentioning

confidence: 99%

Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Zhou

Shangguan

Gao

et al. 2020

Ind. Eng. Chem. Res.

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“…Yang [8,9] first applied the pneumatic conveying to the working face of the coal auger in the extremely thin coal seam and proposed the coal and gangue pneumatic conveying and filling system including the underground separation, the underground transportation, and the pneumatic filling; at the same time, the author designed the precise pressurization system, the high-efficiency dust removal system, and the antiblocking system for the pneumatic conveying of coal particles, which could improve the safety and reliability of pneumatic conveying system for coal with large particle. Yang [31,32] carried out simulation and experimental research on the pneumatic suspension behavior of large irregular coal particles, obtained the suspension speed of coal particles under different particle sizes, and studied the influence of structural parameters of 5-30 mm coal particle gas-solid injection feeder on the pure flow field injection performance and particle injection performance through multifactor orthogonal experiment. Li [33] used CFD-DEM coupling method to carry out numerical simulation of swirling pneumatic conveying of large particle size coal, which shows that swirling pneumatic conveying can improve the integrity of particle pneumatic conveying and extend the service life of pipeline.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Horizontal Pneumatic Conveying of Large Coal Particles Using Discrete Phase Model

Yang

Wang

et al. 2020

Advances in Materials Science and Engineering

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The pneumatic conveying focusing on gas-solid two-phase flow plays an important role in a conveying system. Previous work has been conducted in the fields of small particles, where the size was less than 5 mm; however, there are few studies regarding large sizes (>5 mm). In order to predict the horizontal pneumatic conveying of large coal particles, the coupling methods based on the Euler–Lagrange approach and discrete phase model (DPM) have been used for the simulated research. Compared with the experimental results under the same working condition, the particle trajectory obtained by simulation is similar to the particle distribution at the same position in the experiment, and it turns out that the simulation method is feasible for the horizontal pneumatic conveying of large particles. Multifactor simulations are also carried out to analyse the effects of particle size, flow field velocity, solid-gas rate, and pipe diameter on the wall abrasion during horizontal pneumatic conveying, which provides simulation reference and design guide for pneumatic conveying of large particles.

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“…Generally, studies on gas-solid flows in the stepped pipelines have employed two methods of investigation: experimental and numerical simulation methods [3].…”

Section: Introductionmentioning

confidence: 99%

“…(a) Spatial distribution of gas-solid drag force and (b) PGF near the stepped section with CFD-DEM.X direction gas-solid interaction (N/m3 …”

mentioning

confidence: 99%

Computational Study of Gas‐Solid Flow in a Horizontal Stepped Pipeline

Chu

Pan

et al. 2019

Mathematical Problems in Engineering

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In this paper, the mechanism governing the particle-fluid flow characters in the stepped pipeline is studied by the combined discrete element method (DEM) and computational fluid dynamics (CFD) model (CFD-DEM) and the two fluid model (TFM). The mechanisms governing the gas-solid flow in the horizontal stepped pipeline are investigated in terms of solid and gas velocity distributions, pressure drop, process performance, the gas-solid interaction forces, solid-solid interaction forces, and the solid-wall interaction forces. The two models successfully capture the key flow features in the stepped pipeline, such as the decrease of gas velocity, solid velocity, and pressure drop, during and after the passage of gas-solid flow through the stepped section. What is more important, the reason of the appearance of large size solid dune and pressure surge phenomena suffered in the stepped pipeline is investigated macroscopically and microscopically. The section in which the blockage problem most likely occurs in the stepped pipeline is confirmed. The pipe wall wearing problem, which is one of the most common and critical problems in pneumatic conveying system, is analysed and investigated in terms of interaction forces. It is shown that the most serious pipe wall wearing problem happened in the section which is just behind the stepped part.

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Experiment and simulation analysis of the suspension behavior of large (5–30 mm) nonspherical particles in vertical pneumatic conveying

Cited by 38 publications

References 42 publications

Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Prediction of Horizontal Pneumatic Conveying of Large Coal Particles Using Discrete Phase Model

Computational Study of Gas‐Solid Flow in a Horizontal Stepped Pipeline

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Experiment and simulation analysis of the suspension behavior of large (5–30 mm) nonspherical particles in vertical pneumatic conveying

Cited by 38 publications

References 42 publications

Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Pickup Characteristics of Lump Non-spherical Particles in an Oscillating Airflow

Prediction of Horizontal Pneumatic Conveying of Large Coal Particles Using Discrete Phase Model

Computational Study of Gas‐Solid Flow in a Horizontal Stepped Pipeline

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Experiment and simulation analysis of the suspension behavior of large (5–30 mm) nonspherical particles in vertical pneumatic conveying