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Calibration of DEM Polyhedron Model for Wheat Seed Based on Angle of Repose Test and Semi-Resolved CFD-DEM Coupling Simulation

Author

Listed:
  • Longbao Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Hanyu Yang

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Zhinan Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Qingjie Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Caiyun Lu

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Chao Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

  • Jin He

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Key Laboratory of Agricultural Equipment for Conservation Tillage, Ministry of Agriculture and Rural Affairs, Beijing 100083, China)

Abstract

The shape of particles is a critical determinant that significantly influences the accuracy of discrete element simulations. To reduce the discrepancies between the discrete element model of wheat seeds and the actual particle shapes, and to enhance the accuracy of Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) coupling simulations in gas–solid two-phase flow studies, We employed laser scanning and inverse modeling techniques to develop a three-dimensional (3D) reconstruction of the wheat seed. Subsequently, we employed Rocky DEM simulation software to develop a polyhedron model and an Angle of Repose (AOR) test model. The interval range of material parameters was determined through a series of physical experiments and subsequently employed to delineate the high and low levels of parameters for the simulation tests. The simulation parameters were calibrated using data from AOR simulation tests. The Plackett–Burman test, Steepest-Ascent test, and Box–Behnken test were conducted sequentially to determine the optimal parameter configuration. A test bench for wheat gas-assisted seeding was constructed, and a semi-resolved CFD-DEM coupling simulation model was developed to perform comparative analysis. The results demonstrated that the optimal parameters were as follows: the static friction coefficient of wheat seed was 0.15, the dynamic friction coefficient of wheat seed was 0.11694, and the dynamic friction coefficient between wheat seed and resin was 0.0797. In this scenario, the relative error of AOR was 2.3% and the maximum relative error of ejection velocity observed was 4.1%. The reliability of the polyhedron model and its calibration parameters was rigorously validated, thereby providing a robust reference for studies on gas–solid two-phase flows.

Suggested Citation

  • Longbao Wang & Hanyu Yang & Zhinan Wang & Qingjie Wang & Caiyun Lu & Chao Wang & Jin He, 2025. "Calibration of DEM Polyhedron Model for Wheat Seed Based on Angle of Repose Test and Semi-Resolved CFD-DEM Coupling Simulation," Agriculture, MDPI, vol. 15(5), pages 1-20, February.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:5:p:506-:d:1600399
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    References listed on IDEAS

    as
    1. Guichuan Li & Haiyu Li & Xuan Li & Zhichao Gong & Qinghua Yang & Yuxiang Huang & Zuoli Fu, 2023. "Establishment and Calibration of Discrete Element Model for Buckwheat Seed Based on Static and Dynamic Verification Test," Agriculture, MDPI, vol. 13(5), pages 1-15, May.
    2. Hao Zhou & Tienan Zhou & Xuezhen Wang & Lian Hu & Shengsheng Wang & Xiwen Luo & Jiangtao Ji, 2022. "Determination of Discrete Element Modelling Parameters of a Paddy Soil with a High Moisture Content (>40%)," Agriculture, MDPI, vol. 12(12), pages 1-9, November.
    3. Yan Liu & Guopeng Mi & Shilin Zhang & Peng Li & Yuxiang Huang, 2022. "Determination of Discrete Element Modelling Parameters of Adzuki Bean Seeds," Agriculture, MDPI, vol. 12(5), pages 1-13, April.
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