Investigation of interaction effect between static and rolling friction of corn kernels on repose formation by DEM

Shi, Linrong; Yang, Xianqing; Zhao, Wuyun; Sun, Wei; Wang, Guanping; Sun, Bugong

doi:10.25165/j.ijabe.20211405.4357

Cited by 7 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The contact force between particles was strongly correlated with the frictional characteristics of the surface of the particles [14]. Shi et al [15] explored the effects of particle sliding friction and rolling friction on the accumulation process. In addition, Cao et al [16] showed that the tangential force was higher when the bottom surface roughness was larger, and the corresponding "central depression" of the normal force was more obvious.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Simulation Study of the Accumulation Characteristics for Rice Seeds with Different Moisture Content

Wang

et al. 2022

Foods

View full text Add to dashboard Cite

To study the accumulation characteristics of rice seeds with different moisture content, an accurate model of rice seeds was established by 3D scanning technology. The accumulation state of rice seeds by the “point source” accumulation method was analyzed by proportioning and measuring the simulation parameters with different moisture content. The accumulation process was simulated at 10.23%, 14.09%, 17.85%, 21.77%, 26.41% and 29.22% moisture content, respectively. The velocity and force state of the seeds were visually analyzed by using the accumulation process with a moisture content of 29.22%. The accumulation process was divided into four stages according to the velocity characteristics of the seeds. The average force and kinetic energy of the rice seeds outside the cylinder were obtained, and the average force of the rice seeds outside the cylinder was proved to be the direct cause of the velocity change during the accumulation process. The mechanical characteristics of rice seeds in the quasi-static accumulation stage were partitioned and systematically analyzed. The force distribution of the “central depression” structure of rice seeds with a moisture content of 10.23%, 14.09% and 17.85% on the horizontal surface appeared. The higher the moisture content of rice seeds, the more likely the typical “circular” force structure appeared, and the more uniformly the force on the horizontal surface was distributed in the circumference direction.

show abstract

Section: Introductionmentioning

confidence: 99%

Discrete Element Simulation Study of the Accumulation Characteristics for Rice Seeds with Different Moisture Content

Wang

et al. 2022

Foods

View full text Add to dashboard Cite

show abstract

“…The contact parameters include the recovery coefficient, static friction, and rolling friction. The coefficient of static friction is 0.2 [25] , and the recovery coefficient is 0.182 [12] .…”

Section: Simulation Parametersmentioning

confidence: 99%

“…Differences in gravity center and irregular shape of maize seed can affect the flow properties. However, it was reduced by adjusting the coefficient of rolling friction of maize models [13,14,25,26] .…”

Section: Simulation Parametersmentioning

confidence: 99%

Analysis of the metering performance for typical shape maize seeds using DEM

Shi¹,

Zhao²,

Sun³

et al. 2023

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

The irregular shape, varying internal compositions, and uneven distributions of maize seeds can degrade the metering performance of maize seeders. This study investigates the effect of irregular maize on the performance of a high-filling-rate seed metering device using DEM. The results show that the seed population in the seed box formed large and small cycles of seed transport due to the disturbances caused by the three wheels. The increasing angular speed of the three wheels reduced the rate of seed filling in the seed filling regions by gravity and disturbances. In addition, an analysis of the repose angle formed by the dropped seed indicated that the angular speed of the taking seed wheel has a certain effect. The large angular speed reduced the coefficient of variation of the seed drop location. The repose angle of the horse tooth seed was greater than those of the other. Meanwhile, the irregular maize seed can also reduce the coefficient of variation of the seed drop location. A comparison between the simulation and experiment results indicates the number of metering seed were basically the same.

show abstract

“…Because contact parameters such as the static friction coefficient and rolling friction coefficient significantly affect the repose angle [29], to obtain accurate friction coefficients, this paper subsequently uses the measured values of physical tests as the basis to select the range of values of the simulation test parameters. The repose angle is used to simulate and calibrate the friction coefficient.…”

Section: Rolling Friction Coefficientmentioning

confidence: 99%

Calibration and Testing of Discrete Element Simulation Parameters for Urea Particles

Dong

et al. 2022

Processes

View full text Add to dashboard Cite

The lack of accurate simulation model parameters in the optimization design process of variable fertilizer application devices has resulted in large errors between simulation and theoretical calculation results, which has restricted the development of variable fertilizer application devices to a certain extent. Additionally, there are few scholars studying urea granules, so many parameters of urea granular fertilizer cannot be directly obtained from the literature. The aim of this study is to calibrate a set of simulation parameters by combining physical and simulation tests. In this study, intrinsic parameters were systematically determined, including the particle size, particle density, elastic modulus, Poisson’s ratio and their static friction coefficients, rolling friction coefficients and restitution coefficients of urea particles. By performing the urea particle stacking test, the static friction coefficient between urea particles was calibrated to 0.27, and the rolling friction coefficient between particles was 0.11. To check the reliability of the calibration parameters, the simulation and physical tests of the repose angle and bulk density of urea particles were compared, and the results show that the relative error of repose angles and bulk density of urea particles was 0.78% and 1.19%, respectively. Through the simulation of the mechanical variable fertilizer discharger and the comparison test of the benchtop fertilizer discharging performance, the maximum relative error between the simulation and physical test fertilizer discharge is 3.69% when the working length of the outer sheave is 25 mm; the maximum relative error between the simulation and physical test fertilizer discharge is 3.39% when the working length is 35 mm; the maximum relative error between the simulation and physical test fertilizer discharge is 6.86% when the working length is 45 mm; the maximum relative error between the simulation and physical test fertilizer discharge is 4.95% when the working length is 55 mm. The maximum relative error between the simulated and physical test fertilizer discharge was 6.86% at 45 mm opening and 4.95% at 55 mm opening, and the results show that the urea particle calibration parameters are reliable. The results of this study can provide a theoretical reference for the optimization design and simulation study of variable fertilizer application devices.

show abstract

Investigation of interaction effect between static and rolling friction of corn kernels on repose formation by DEM

Cited by 7 publications

References 15 publications

Discrete Element Simulation Study of the Accumulation Characteristics for Rice Seeds with Different Moisture Content

Discrete Element Simulation Study of the Accumulation Characteristics for Rice Seeds with Different Moisture Content

Analysis of the metering performance for typical shape maize seeds using DEM

Calibration and Testing of Discrete Element Simulation Parameters for Urea Particles

Contact Info

Product

Resources

About