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Volume 15
Issue 20
10.3390/app152011163
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Establishment and Parameter Calibration of a DEM-Based Contact Model for Leymus chinensis Seed–Straw Mixtures

by
Qihao Wan
1,†,
Anbin Zhang
2,†,
Wenxue Dong
2,*,
Fei Liu
2,
Yingsi Wu
2,
Yin Qi
1 and
Yuxing Ren
2
1
Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot 010013, China
2
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Appl. Sci. 2025, 15(20), 11163; https://doi.org/10.3390/app152011163
Submission received: 4 August 2025 / Revised: 9 October 2025 / Accepted: 15 October 2025 / Published: 17 October 2025
(This article belongs to the Section Agricultural Science and Technology)
Versions Notes

Abstract

The study of Leymus chinensis seed cleaning has been hindered by the lack of accurate discrete-element contact parameters for seed–straw interactions, thereby limiting, to some extent, the optimization of cleaning equipment. To address this issue, the present study analyzed a mixture of L. chinensis seeds and straw, and determined their fundamental physical and contact parameters via laboratory experiments. The Hertz–Mindlin (no slip) discrete element simulation model was employed to calibrate the parameters of the seed–straw mixture. A Plackett–Burman test was used to identify key factors significantly affecting the repose angle, including the seed–seed static friction coefficient and the seed–straw static and dynamic friction coefficients. These factors’ optimal ranges were further refined using steepest ascent experiments. A Box–Behnken design was used to optimize contact parameters, resulting in the following values: a seed–seed static friction coefficient of 0.709, a seed–straw static friction coefficient of 0.281, and a seed–straw dynamic friction coefficient of 0.085. Validation experiments demonstrated an error of less than 2.14%, confirming the reliability of the calibrated parameters. This study offers a theoretical foundation for discrete element simulations in L. chinensis seed cleaning applications.
Keywords: Leymus chinensis seeds; straw; seed cleaning; discrete element method; contact parameter calibration; repose angle Leymus chinensis seeds; straw; seed cleaning; discrete element method; contact parameter calibration; repose angle

Share and Cite

MDPI and ACS Style

Wan, Q.; Zhang, A.; Dong, W.; Liu, F.; Wu, Y.; Qi, Y.; Ren, Y. Establishment and Parameter Calibration of a DEM-Based Contact Model for Leymus chinensis Seed–Straw Mixtures. Appl. Sci. 2025, 15, 11163. https://doi.org/10.3390/app152011163

AMA Style

Wan Q, Zhang A, Dong W, Liu F, Wu Y, Qi Y, Ren Y. Establishment and Parameter Calibration of a DEM-Based Contact Model for Leymus chinensis Seed–Straw Mixtures. Applied Sciences. 2025; 15(20):11163. https://doi.org/10.3390/app152011163

Chicago/Turabian Style

Wan, Qihao, Anbin Zhang, Wenxue Dong, Fei Liu, Yingsi Wu, Yin Qi, and Yuxing Ren. 2025. "Establishment and Parameter Calibration of a DEM-Based Contact Model for Leymus chinensis Seed–Straw Mixtures" Applied Sciences 15, no. 20: 11163. https://doi.org/10.3390/app152011163

APA Style

Wan, Q., Zhang, A., Dong, W., Liu, F., Wu, Y., Qi, Y., & Ren, Y. (2025). Establishment and Parameter Calibration of a DEM-Based Contact Model for Leymus chinensis Seed–Straw Mixtures. Applied Sciences, 15(20), 11163. https://doi.org/10.3390/app152011163

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