The conclusions were: three-dimensional simulation of screening efficiency along the screen length follows an exponential distribution; when the sieve vibrates over a certain frequency range the screening efficiency is stable; and, higher vibration frequencies can improve the handling capacity of the screening machine.
with horizontal line, vibration frequency is 15 Hz and vibration amplitude is 2.0 mm. Table 1 gives the material properties used in the simulation, which are based on the properties of coal parti-
The discrete element method (DEM) has been widely used to simulate microscopic interactions between particles. Screening is a deeply complicated process when considering the law of motion for the ...
The material is always in motion during the vibration screening process, and the state of the material fed into the vibrating screen is changing. ... The stable state of the screening process obtained by DEM simulation is shown in Fig. 5 (a). The sieve surface was divided into 49 × 25 square regions with the size of 20 mm × 20 mm.
A numerical study of the motion particulates follow along a circularly vibrating screen deck was done using the three dimensional Discrete Element Method (DEM). The motion of the particles was analyzed. The effects of vibration amplitude, throwing index, and screen deck inclination angle on the screening process are discussed. The results show that the average velocity of …
The article contains sections titled: 1 Basics 2 Applications 3 Theory of Screening 3.1 Material Motion on a Screen 3.2 Particle Motion at Higher Particle Concentrations 3.3 Coefficient of ...
The base vibration conditions are: the vibration motion is sinusoidal and linear along the direction 45° with horizontal line, vibration frequency is 15 Hz and vibration amplitude is 2.0 mm. Table 1 gives the material properties used in the simulation, which are based on the properties of coal particles and polyurethane screen deck.
In this work, DEM results and experimental data from a specially designed circularly vibrating screening model are compared quantitatively under a range of operating conditions. …
DEM SIMULATION AND EXPERIMENTAL STUDY ON THE SCREENING PROCESS OF ELLIPTICAL VIBRATION MECHANICAL SYSTEMS. B ING C HEN, JIWEI Y AN, W EI M O, C HUANLEI X U, L IJIE Z HANG, K UMAR K T AMMA 2026 JOURNAL OF V IBROENGINEERING.D ECEMBER 2019, V OLUME 21, ISSUE 8 The screening process is …
To solve the problems in the DEM simulations of the screening process of a swing-bar sieve, in this paper we propose the real-virtual boundary method to build t ... Numerical simulation and analysis of vibration screening based on EDEM," Transactions of the Chinese Society of Agricultural Engineering, vol. 27, May . 2011
Dong KJ, Yu AB, Brake I. DEM simulation of particle flow on a multi-deck banana screen. ... et al. DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems. J Vibroeng 2019; 21(8 ... et al. Simulation of the screening process on a circularly vibrating screen using 3D-DEM. Min Sci Technol 2011; 21:
elliptical vibration screening process in this paper. A vibration screening model is particularly based on the purpose of our research to fundamentally demonstrate the novel relationships …
A numerical study of the motion particulates follow along a circularly vibrating screen deck was done using the three dimensional Discrete Element Method (DEM). The motion of the particles was analyzed. The effects of vibration amplitude, throwing index, and screen deck inclination angle on the screening process are discussed.
In this work, the discrete element method (DEM) is used to study the screening process in VFFS to explain particle flow and separation behavior at the particle scale. Unlike traditional vibrating screens, for VFFS, the amplitude response of each point on the elastic sieve mat is different everywhere.
The deviation between the sieving efficiency of the DEM simulation test and the plant sieving test was within 15%, indicating that the DEM simulation had high accuracy. ... simulated the sieving process with different particle characteristics and sieve characteristics at various vibration parameters using DEM and validated the classical ...
Moreover, the novel process models based on artificial intelligence modelling, DEM simulation, and physics laws can help the design, control and optimisation of screening processes. View Show abstract
In this work, the discrete element model of wet sand and gravel particles is established, and the vibration screening process is simulated using the discrete element method (DEM).
CHEN Yan-hua et al Application of the DEM to screening process: a 3D simulation 495 rameters used in the simulations is presented in Table ... Fig. 1 Schematic layout of the vibration screening model
The DEM model for the screening process with a circular vibration motion is established and a series of simulations are conducted with the same conditions to those of laboratory experiments as listed in Table 2 for both spherical and non-spherical particles.
The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the …
Most of the vibrating screens pay too much attention to the screening efficiency and neglect the material transportation speed in the research process, so this paper introduces W to comprehensively consider the influence of screening efficiency and material transportation speed, and optimizes the vibration parameters of the vibrating screen based on the GRNN …
have used DEM for simulation of equal-thick screening process. For example, Fernandez, who studied on the double-layer banana screen for wet particles by DEM-SPH coupling model to analysis the influence of bed thickness, density of particles floating form [6]. 2 The Analysis of Screening and Model of Particulate Contacts 2.1 The Analysis of ...
A Linear Vibrating Banana Screen Using DEM 3D Simulation 351 Figure 3 Diagrammatic sketch of vibrating banana screen model. The effects of vibration parameters, i.e. frequency, amplitude and vibration
We investigated the movement of particles in screening process over the sieve plate of a linear vibrating screen using the Discrete Element Method (DEM). The behavior of …
The motion of a vibrating screen can be defined as three types, linear, circular or elliptical, depending upon the trajectory. Fig. 1 shows that λ is the amplitude and β is the vibration direction angle of the model. The simulations use an improved DEM dry contact soft-sphere model [13], [14]. Fig. 2 shows that k n and d n are the normal stiffness and normal damping; k t …
A virtual screening model and a three-dimensional geometry of a vibrating screen were set up to perform a simulation of screening process using DEM and a finite element analysis, respectively.
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 …
The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the screen deck were analyzed for linear, circular and elliptical vibration of the screen. The results show that the travel velocity of the particles is the fastest, but the screening efficiency is the …
Semantic Scholar extracted view of "Influence of vibration mode on the screening process" by Hailin Dong et al. ... DEM simulation of particle flow on a multi-deck banana screen. K. Dong A. Yu I. Brake. Engineering, Materials Science. 2009; 145. Save. Screen Simulation Using a Particle Discrete Element Method.
For an elliptical vibration system, the vibration parameters seriously affect conveying speed and sieving efficiency of the materials. In addition, considering the lack of studies about the elliptical vibration machine, we applied the discrete element method to simulate and analyze the elliptical vibration screening process in this paper. A vibration screening model …
The screening process, including the looseness, stratification, collision and penetration, can be well captured by the DEM simulation. (2) For the rotary vibrating screen, the circular translation is a very important component of the rotary vibrating screen motion, which cannot be eliminated from the screening process.
DOI: 10.21595/jve.2019.19993 Corpus ID: 209526473; DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems @article{Chen2019DEMSA, title={DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems}, author={Bing Chen and Jiwei Yan and Mo Wei and Chuanlei Xu and …
DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems Journal of Vibroengineering 10.21595/jve.2019.19993
A virtual screening model and a three-dimensional geometry of a vibrating screen were set up to perform a simulation of screening process using DEM and a finite element …
Vibrating flip-flow screens (VFFS) with stretchable polyurethane sieve mats have been widely used in screening fine-grained materials in recent years. In this work, the discrete element method (DEM) is used to study the screening process in VFFS to explain particle flow and separation behavior at the particle scale. Unlike traditional vibrating screens, for VFFS, the …
influence of vibration mode on the screening process was studied by (Dong, Liu, Zhao, & Zhao, 2013). Dong, Wang, & Yu (2013) studied the effects of variables such as the
In this work, the discrete element method (DEM) is used to study the screening process in VFFS to explain particle flow and separation behavior at the particle scale. ... unlike other vibrating screening equipment, the vibration responses of the elastic sieve mat of the VFFS are more complicated. ... in the DEM simulation, the screening ...
The CFD-DEM based wet vibrating screening model established in this paper is an effective method to explore the wet screening process. Based on the CFD-DEM coupling simulation framework, with the employment of porous media model, the numerical wet screening process model are established and the simulation results are consistent with the ...