scholarly journals DEM Simulation of Spin Vibration Screening Process

2011 ◽  
Vol 2-3 ◽  
pp. 960-965
Author(s):  
Dong Sheng Li ◽  
Yi Qiong Du
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Motion Simulation ◽  
Screening Process ◽  
Dem Simulation ◽  
Simulation Results ◽  
Element Method

This paper focus on the motion simulation and visualization of the material particles in the operation of the spin vibration screening using DEM(Discrete Element Method). Based on analysis of the simulation results, some conclusions are made which provide the theory basis in order to design the screen parameters reasonably. Finally some experiments are carried out in order to verify the correctness of the simulation.

scholarly journals Analysis of the mixing of solid particles in the slant cone and ploughshare mixers via Discrete Element Method (DEM)

2021 ◽  
Author(s):  
Seyed-Meysam Seyed-Alian
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Solid Particles ◽  
Mixing Efficiency ◽  
Dem Simulation ◽  
Initial Loading ◽  
Positron Emission ◽  
Simulation Results ◽  
Fill Level ◽  
Element Method

Discrete element method (DEM) was employed to characterize the mixing of the solid particles in two different types of the powder blenders. In the first part of this study, DEM was used to investigate the effects of initial loading, drum speed, fill level, and agitator speed on the mixing efficiency of a slant cone mixer. DEM simulation results were in good agreement with the experimentally determined data, both qualitatively and quantitatively. In the second part of this study, DEM was employed to characterize the mixing of the solid particles in a Ploughshare mixer. To validate the model, the simulation results were compared to the positron emission particle tracking (PEPT) data reported in the literature. The validated DEM was then utilized to calculate the mixing index as a function of the initial loading, plough rotational speed, fill level, and particle size for a ploughshare mixer.

scholarly journals Analysis of the mixing of solid particles in the slant cone and ploughshare mixers via Discrete Element Method (DEM)

2021 ◽  
Author(s):  
Seyed-Meysam Seyed-Alian
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Solid Particles ◽  
Mixing Efficiency ◽  
Dem Simulation ◽  
Initial Loading ◽  
Positron Emission ◽  
Simulation Results ◽  
Fill Level ◽  
Element Method

Discrete element method (DEM) was employed to characterize the mixing of the solid particles in two different types of the powder blenders. In the first part of this study, DEM was used to investigate the effects of initial loading, drum speed, fill level, and agitator speed on the mixing efficiency of a slant cone mixer. DEM simulation results were in good agreement with the experimentally determined data, both qualitatively and quantitatively. In the second part of this study, DEM was employed to characterize the mixing of the solid particles in a Ploughshare mixer. To validate the model, the simulation results were compared to the positron emission particle tracking (PEPT) data reported in the literature. The validated DEM was then utilized to calculate the mixing index as a function of the initial loading, plough rotational speed, fill level, and particle size for a ploughshare mixer.

scholarly journals Computer simulation of flat geogrids based on Discrete Element Method (DEM)

2019 ◽  
Vol 265 ◽  
pp. 01002
Author(s):  
Andrei Moshenzhal
Keyword(s):  
Computer Simulation ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Material Structure ◽  
Dem Simulation ◽  
Simulation Results ◽  
Element Method ◽  
The Way

The article presents the way of modelling flat geogrids using the Discrete Element Method (DEM). Simulation of geogrids is performed on the base of EDEM® software produced by DEM Solutions Ltd. The Hertz-Mindlin model with bonds is used as a model of particles interaction. The presented method of geogrid simulation using EDEM® software has some peculiarities in the formation of material structure. We compared two types of geogrids with the same characteristics formed out of a variety of balls with different radii. This article provides the simulation results of geogrid testing by calculating the force causing 2% and 5% tension (elongation) of the material.

Banana Screening Method and Simulation of Banana Screening Process Using Discrete Element Method

2012 ◽  
Vol 524-527 ◽  
pp. 949-952
Author(s):  
Hai Lin Dong ◽  
Chu Sheng Liu ◽  
Yue Min Zhao ◽  
La La Zhao
Keyword(s):  
Discrete Element Method ◽  
Screening Method ◽  
Discrete Element ◽  
Structural Features ◽  
Constant Thickness ◽  
Screening Process ◽  
Ball Contact ◽  
Simulation Results ◽  
Velocity Changes ◽  
Element Method

This paper presented the fundamentals of banana screening method and the structural features of the banana screen. Based on soft-dry ball contact model, banana screening process was simulated by using 3D discrete element method. The results show that the material bed on banana screen possesses a characteristic of thin and constant thickness along the screen plate. The particles velocity on the screen deck shows a decreasing distribution along the screen deck length and the decrease of velocity changes from steep at the feed end to flat at the discharge end. The instantaneous efficiency of banana screen can reach to above 0.95 and the efficiency of steady state is about 0.83. Numerical simulation results can provide references for insight understanding of the banana screening mechanism and optimization of banana screen.

Numerical simulation of particle screening efficiency of large multi-layer vibrating screen based on discrete element method

2021 ◽  
pp. 095440892110606
Author(s):  
Yujia Li ◽  
Peng Zhao ◽  
Li Mo ◽  
Tao Ren ◽  
Minghong Zhang
Keyword(s):  
Discrete Element Method ◽  
Environmental Protection ◽  
Inclination Angle ◽  
Discrete Element ◽  
Physical Parameters ◽  
Screening Process ◽  
Efficient Operation ◽  
Vibrating Screen ◽  
Screening Efficiency ◽  
Element Method

With the increasing requirements for energy conservation and environmental protection, multi-layer vibrating screens have become hot issues. Compared with single-layer vibrating screens, multi-layer vibrating screens has much better performance in terms of processing effect, treatment capacity, and environmental protection. The research on the physical parameters of the multi-layer vibrating screen is of great significance to the actual production. However, analysis and simulation studies of multi-layer vibrating screens are limited. In this paper, the screening process of wet particles on a multi-layer vibrating screen was simulated by using the discrete element method. The characteristics and application scope of the two vibration modes were analyzed. The particle penetration rate, the number of collisions, and the distribution of the particles under 23 combinations of structures and vibration parameters were investigated. The influence of different parameters on screening performance was analyzed. Several optimal combinations of frequency, amplitude and screen inclination angle under different working conditions were obtained. The screening efficiency of the balanced elliptic motion is higher than that of the linear motion. The best combination of the three parameters is 4 mm amplitude, 20 Hz frequency, and 3° inclination angle. The efficiency is higher when the particles follow a distribution of arithmetic on the screen. This study provides a reference for the efficient operation and optimal design of large multi-layer screening equipment.

Jaw Crusher Based on Discrete Element Method

2013 ◽  
Vol 312 ◽  
pp. 101-105
Author(s):  
Fu Sheng Mu ◽  
Hui Li ◽  
Xing Xue Li ◽  
Hong Zhi Xiong
Keyword(s):  
Energy Consumption ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Working Process ◽  
Element Analysis ◽  
Dem Simulation ◽  
Force Condition ◽  
Jaw Crusher ◽  
Set Up ◽  
Element Method

In order to analyze the force condition and crushing power of crusher teeth plate, the discrete element method models of jaw crusher and double-cavity jaw crusher are set up respectively using EDEM, a kind of software for discrete element analysis. Meanwhile, the working process, the loading force on the teeth plate and crushing power are simulated. The results show that: the rationality of the DEM simulation is declared, and the crushing process of the particles is also shown intuitively. The loading force condition and the crushing power of the moving jaw teeth plate serve as basis for its abrasion and energy consumption respectively.

Study on the Particle Behavior in a Screw Conveyer System by the Discrete Element Method

2011 ◽  
Author(s):  
Yusuke Shigeto ◽  
Mikio Sakai ◽  
Shin Mizutani ◽  
Seiichi Koshizuka ◽  
Shuji Matsusaka
Keyword(s):  
Discrete Element Method ◽  
Large Scale ◽  
Discrete Element ◽  
Dem Simulation ◽  
Memory Space ◽  
Industrial Systems ◽  
Simulation Techniques ◽  
Conveyer System ◽  
Grain Model ◽  
Element Method

Large amount of particles are used in the industrial systems. Numerical analyses of these systems are expected to reduce designing cost. However the numerical analysis of powder is not used practically, because it requires high calculation cost which grows up with the number of particles. Besides, there are memory consumption problem which is required for calculation space. In this paper, the parallel simulation techniques of the Discrete Element Method (DEM) on multi-core processors are described. In the present study, it is shown that the algorithm enables all the processes of the DEM to be executed parallel. Moreover, a new algorithm which makes the memory space usage effectively and accelerates the calculation speed is proposed for multi-thread parallel computing of the DEM. In the present study, the memory space usage is shown to be reduced drastically by introducing this algorithm. In addition, the coarse grain model which emulates original particles with less calculation particles is applied in order to reduce calculation cost. For the practical usage of the DEM in industries, the simulation is performed in a large-scale powder system which possesses a complicated drive unit. In the current study, it is shown that the large scale DEM simulation of practical systems is enabled to be executed by our proposing algorithms.

Discrete element method (DEM) simulation and validation of a screw feeder system

2016 ◽  
Vol 287 ◽  
pp. 131-138 ◽  
Author(s):  
D. Kretz ◽  
S. Callau-Monje ◽  
M. Hitschler ◽  
A. Hien ◽  
M. Raedle ◽  
...  
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Dem Simulation ◽  
Screw Feeder ◽  
Simulation And Validation ◽  
Element Method
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