Measurement and Calibration of DEM Parameters of Soybean Seed Particles

In discrete element method (DEM) simulations, accurate simulation parameters are very important. For ellipsoidal soybean seed particles, the rolling friction coefficient between seed particles (RFCP-P) and the rolling friction coefficients between seed particle and boundary (RFCP-B) are difficult to...

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Bibliographic Details
Published inAgriculture (Basel) Vol. 12; no. 11; p. 1825
Main Authors Yan, Dongxu, Yu, Jianqun, Wang, Yang, Sun, Kai, Zhou, Long, Tian, Ye, Zhang, Na
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2022
Subjects
Aldehydes
Analysis
Angle of repose
Calibration
Cameras
Coefficient of friction
Crystals
Deformation
Density
Discrete element method
ellipsoidal shape
Friction
Gravity
Measurement
Medical screening
Moisture content
parameter calibration
Parameter sensitivity
Restitution
rolling friction coefficient
Rolling resistance
Rotating cylinders
Screening
Seeds
Simulation
Simulation analysis
Simulation methods
Sliding friction
Soybean
soybean seed
Soybeans
Test methods
China
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Summary:In discrete element method (DEM) simulations, accurate simulation parameters are very important. For ellipsoidal soybean seed particles, the rolling friction coefficient between seed particles (RFCP-P) and the rolling friction coefficients between seed particle and boundary (RFCP-B) are difficult to measure experimentally and therefore need to be calibrated. In this paper, soybean seed particles of three varieties with different sphericities were taken as the research objects. Through the simulation analysis of repose angle and self-flow screening, it was shown that the above two parameters needed to be accurately calibrated. In addition, the sensitivity of the RFCP-P and RFCP-B to the angle of repose was analyzed by simulating the repose angle test. The results showed that the RFCP-P had a significant effect on the test results of the repose angle, and the RFCP-B had little effect on the test results of the repose angle. Therefore, the RFCP-P was calibrated using a single-factor test of repose angle, and the RFCP-B was calibrated using the repose angle test with soybean particles mixed with organic glass spheres. The accuracy of the calibration parameters was verified by rotating cylinder test and self-flow screening test.
ISSN:2077-0472
2077-0472
DOI:10.3390/agriculture12111825