Simulation and experiment study on segregation mechanism of rice from straws under horizontal vibration

Ma, Xuedong; Guo, Bingjiang; Li, Lingling

doi:10.1016/j.biosystemseng.2019.06.015

Cited by 24 publications

(7 citation statements)

References 36 publications

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“…Some characteristic parameters with specific purpose and significance were defined according to the statistical concept in the study of particle system motion. The parameters to quantify the group motion characteristics of particle system include expansion coefficient, deformation coefficient, delamination coefficient and migration coefficient; The mixing parameters of quantitative particle system include mixing degree, volume concentration and Lacey mixing index [20]; The parameters to quantify the activity of particle system include particle velocity, kinetic energy and particle temperature. The five main vibration modes in the superimposed vibration sub-type and main type are horizontal linear vibration, vertical shimmy, horizontal shimmy, combined vibration and combined shimmy.…”

Section: Description Of Five Main Vibration Modes In Superimposed Vib...mentioning

confidence: 99%

A systematic review of vibration separation mechanism of multi-factor and multi-curve superposition for multi-component mixed particles

Zhang

Juanatas

Niguidula

et al. 2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

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In this study, the discrete element method (DEM) and experimental means are proposed to be used, combined with theoretical mechanics, powder mechanics, fluid mechanics, mechanical vibration and other mechanical theories. When studying the multi-factor and multi-curve superimposed vibration of multi-component mixed particles, the structure of vibrating body, vibration combination order, vibration time, vibration frequency, amplitude, particle factors and other factors affect the dynamic parameters, kinematic parameters, particle layer flow field, organization field and other laws of the separation process of multi-component mixed particles. Reveal the evolution mechanism of the breeding, growth, formation and decay of the separation configuration of multicomponent mixed particles, and carry out SPSS multivariate statistics and regression analysis to establish the corresponding mathematical model. On the basis of the above, a multifactor and multi-curve superposition vibration separation experiment was carried out on the mixed particles of metal ore, and the separation process was effectively controlled by using MATLAB neural network tool. Finally, it is proposed to use the bionic method to observe the manually superimposed vibration modes such as round screen and dustpan, and use the bionic hand and bionic joint to design the mechanical and electrical drawings, action flow diagrams and specific procedures of the equipment, and manufacture the corresponding vibration equipment. The work will enrich the theory of vibration separation of mixed particles, and provide useful theoretical reference and practical equipment for the vibration separation process of multi-component mixed particles with different shapes, sizes and densities.

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Section: Description Of Five Main Vibration Modes In Superimposed Vib...mentioning

confidence: 99%

A systematic review of vibration separation mechanism of multi-factor and multi-curve superposition for multi-component mixed particles

Zhang

Juanatas

Niguidula

et al. 2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

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“…in several studies to model granular particles for different applications including agriculture, mining, metallurgy and space research [29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Edem Literature Reviewmentioning

confidence: 99%

Evaluation of Discrete Element Models for Prediction of Abrasive Mass Flow Rate in Abrasive Jet Machining Systems

Mozafary

2023

Preprint

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<p>The flow of abrasive particles in the pressurized feed system of an abrasive jet micro machining (AJM) apparatus was investigated both experimentally and computationally. The feasibility of predicting the abrasive mass flow rate using discrete element methods implemented in two commercial software packages, i.e. LS-DYNA and EDEM, was studied. A method to simulate applied pressure was developed, and computer codes to extract relative data during postprocessing were implemented. For a simplified system using spherical particles, the EDEM results better agreed with measured mass flow rates, while LS-DYNA software grossly underestimated the measured mass flow rate. The effect of pressure on mass flow rate was studied numerically using EDEM and the trends largely agreed with the experiments. Overall, it is possible to use discrete element methods to simulate powder flow in AJM systems, but only at an exceptionally high computational cost, and with considerable effort to extract relevant data.</p>

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“…Granular matter is widely defined as a material composed of a large number of discrete solid particles, and its mechanical properties are often more abundant than ordinary solids and fluids, mainly due to the dispersion performance between solid particles within the particle system and the non-linear dissipation characteristics of particle interactions [1][2]. The particle system is a multi body interaction system mainly composed of contact forces, and it is also an imbalanced complex system with energy dissipation [3].…”

Section: Introductionmentioning

confidence: 99%

Study on the segregation effect of pyrite and brass ore particles under combined pendulum vibration

Zhang,

Juanatas,

Niguidula

et al. 2024

J. Phys.: Conf. Ser.

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This article uses a combined pendulum mode to study the segregation behavior of spherical particles of pyrite and brass ore with different diameters using the discrete element method. The numerical simulation program includes extensive oscillation tests on binary mixed particles of pyrite and brass ore spherical particles in different steel U-shaped oscillation grooves, different oscillation frequencies, oscillation angles, and particle sizes. The dispersion coefficient γ calculated from the Lacey mixing index M is used to characterize the segregation behavior of binary mixed particles and track the evolution of segregation. Numerical simulation shows that the oscillation frequency is 8 Hz, the oscillation amplitude is 14°, and the dispersion coefficient γ of the first group with protrusions reaches 0.8, which is about 19.4% higher than the dispersion coefficient 0.67 of the first group with light grooves. The dispersion coefficient γ of the second group with added protrusions reached 0.69, which is about 16.95% higher than the dispersion coefficient 0.59 of the second group when using a light groove. The addition of protrusions improved the particle layering effect. The oscillation amplitude is taken as 14°, and the oscillation frequencies are taken as 6Hz, 8Hz, 10Hz, and 12Hz, respectively. As the oscillation frequency increases, collisions between particles become more intense, and the dispersion coefficient γ between particles increases to a certain extent when it changes from 6Hz to 8Hz. Then, as the oscillation frequency increases, the dispersion coefficient γ decreases in severe fluctuations, and the particle stratification effect actually deteriorates. The oscillation frequency is taken as 8Hz, and the oscillation amplitude is taken as 10°, 14°, and 18°, respectively. After the oscillation amplitude increases to 14°, the dispersion coefficient γ of the particles remains basically stable, and changing the oscillation amplitude has almost no effect on the particle stratification effect. The oscillation frequency is 8Hz, and the oscillation amplitude is 14°. When adding protrusions to the steel U-shaped oscillation groove, the average relative errors of both experimental schemes are less than 1%, and the correlation coefficients are close to 1. The data points are very close to the 45° line. It indicates that the experimental data and simulation values have high consistency, and the discrete element method is feasible and reliable as a method for studying mineral particulate matter. The in-depth study of the separation and stratification behavior of ore particles under combined oscillation is of great scientific significance for the development of new combined vibration equipment.

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Simulation and experiment study on segregation mechanism of rice from straws under horizontal vibration

Cited by 24 publications

References 36 publications

A systematic review of vibration separation mechanism of multi-factor and multi-curve superposition for multi-component mixed particles

A systematic review of vibration separation mechanism of multi-factor and multi-curve superposition for multi-component mixed particles

Evaluation of Discrete Element Models for Prediction of Abrasive Mass Flow Rate in Abrasive Jet Machining Systems

Study on the segregation effect of pyrite and brass ore particles under combined pendulum vibration

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