Article
Engineering, Chemical
Yinglong Wang, Fuguo Jia, Jincheng Zhang, Yanlong Han, Peiyu Chen, Anqi Li, Jiaming Fei, Wenyu Feng, Xianzhi Hao, Shaohang Shen
Summary: In this study, the effect of eccentricity on particle flow characteristics and discharge rate was analyzed using the discrete element method. The concept of critical eccentricity was introduced based on the change in particle flow characteristics. A prediction model for critical eccentricity was proposed by considering the variation in discharge rate.
Review
Agronomy
Weiquan Fang, Xinzhong Wang, Dianlei Han, Xuegeng Chen
Summary: The discrete element method and simulation analysis provide a convenient and effective method for the optimal design of farming machinery, but parameter calibration is necessary to improve the reliability of simulation results.
Article
Agronomy
Guiju Fan, Siyu Wang, Wenjie Shi, Zhenfeng Gong, Ming Gao
Summary: This study calibrated the simulation parameters of pears by combining physical experiments and simulations, establishing the accumulation angle of pears. The research analyzed the influence factors on pear accumulation angles and constructed an optimal model with reliable results.
Article
Engineering, Chemical
Paula A. Gago, Marcos A. Madrid, Stefan Boettcher, Raphael Blumenfeld, Peter King
Summary: In this study, we use the discrete element method to investigate the effect of a bevelled outlet on the discharge rate of mono-sized spheres from a quasi-two-dimensional silo. We show that the bevelling increases the flow rate comparably to the inclination in hopper walls, and different openings with similar discharge rates result in distinctly different internal dynamics. These findings have the potential to improve control of silo discharges and significantly reduce production and handling costs.
Article
Agronomy
Jinming Zheng, Lin Wang, Xiaochan Wang, Yinyan Shi, Zhenyu Yang
Summary: In this study, the discrete element parameters of cabbages were calibrated for the design and optimization of a cabbage harvester. The cabbage model was created based on the study of cabbage material characteristics and the simulation model parameters were calibrated. The calibrated parameters were applied in the verification test, showing dependable results with only a 1.63% error between the simulated and measured values of the cabbage accumulation angle. This study provides theoretical support for designing and optimizing cabbage harvesting machines using the discrete element method (DEM).
Article
Engineering, Civil
Weiwei Sun, Jun Feng, Fengtao Mao
Summary: The study shows that central cone silos with higher aspect ratios have particular pressure distribution characteristics on the wall and cone. Based on experimental data with different aspect ratios, the overpressure factors of the wall and cone slightly decrease, with a more pronounced variation in cone pressure.
Article
Agronomy
Yang Jiang, Yurong Tang, Wen Li, Yong Zeng, Xiaolong Li, Yang Liu, Hong Zhang
Summary: This study determines the crucial parameters of thin-skinned walnut particles in classification simulation using the combination of discrete element method (DEM) and physical tests. The parameters significantly influencing the stacking angle were screened and a quadratic regression model was built to achieve the optimal parameter combination. The stacking and classification experiments verified the effectiveness of the optimal parameters and provided technological support to walnut classification simulation and parameter determination for other shell materials.
Article
Chemistry, Multidisciplinary
Zhenwei Dai, Mingliang Wu, Zhichao Fang, Yongbo Qu
Summary: In this study, the intrinsic parameters of lily bulbs were measured and a discrete element model was established for simulation stacking tests. The contact parameters between the lily bulb and Q235 steel were optimized, resulting in a more accurate stacking angle prediction. The research findings can serve as references for simulation tests in mechanized harvesting and post-harvest processing of lily.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Minhan Liao, Aimin Liao, Jiufu Liu, Zhao Cai, Hongwei Liu, Tao Ma
Summary: The paper introduces a new calibration method using two peristaltic pumps to improve the efficiency of TBR calibration. Through comparison experiments and scheme-based experiments, it is proven that the method is feasible and can significantly reduce the required calibration time.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Chemical
Jingzhen Zhu, Wentao Xu, Rongyao Zheng, Can Wang, Xiwen Li
Summary: This paper presents a study on the residence time distribution (RTD) and flow pattern of particles in a two-dimensional flat-bottom batch discharge silo under gravity. The study found that the residence time of particles in the silo follows an elliptical distribution and proposed an improved radial flow model, which has significant implications for silo design and scaling up in industrial applications.
Article
Construction & Building Technology
Xue Li, Cuiping Li, Zhuen Ruan, Bingheng Yan, Hezi Hou, Long Chen
Summary: This study simulated the flow behavior of paste during the mixing process using the discrete element method and calibrated the parameters of the particle contact model. It was found that particle agglomeration affected particle motion, while van der Waals and electrostatic forces influenced particle interactions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Dancheng Zhang, Shijie Dong, Hui Guo, Xiaodong Yang, Lijie Cui, Xiaoxing Liu
Summary: The study investigates the rheological behavior of particles in granular assembly under funnel flow and mixed flow discharge modes using 3D DEM simulations. Results show no fundamental difference in particle velocity fluctuations between the two modes.
Article
Engineering, Chemical
Siyao Yu, Haoran Bu, Wancheng Dong, Zhen Jiang, Lixin Zhang, Yuanqing Xia
Summary: Based on physical and simulation experiments, we calibrated the basic characteristic parameters for granular fungal fertilizers, which have received little attention. These calibrated parameters can provide a basis for simulation analysis and parameter optimization for variable-rate fertilization systems.
Article
Engineering, Chemical
Cai-Ning Lan, Zi-Jian Xu, Ming-Qiang Zhu, Lin Zhu
Summary: The calibration of the discrete element model for EUO samara addresses the lack of such simulation models and parameters in the development of mechanical hulling technology and equipment. The model, based on the Hertz-Mindlin with bonding model, was calibrated using physical experiments to measure the relevant parameters. The results showed a 0.93% relative error between the simulated and measured maximum shear force. The model and parameter calibration established in this research can be used for discrete element simulation research, providing guidance for the research and development of EUO samara hulling equipment.
Article
Agronomy
Long Zhou, Qiu Dong, Jianqun Yu, Yang Wang, Yulong Chen, Mingwei Li, Wenjun Wang, Yajun Yu, Jun Yuan
Summary: An appropriate contact mechanics model and parameters were explored in this study to accurately analyze the contact process between maize seeds and soil. The Edinburgh Elasto-Plastic Adhesive (EEPA) model was selected to describe the contact between seed and soil particles, and the input parameters in the EEPA model were investigated using the Plackett-Burman test. The optimized parameter combinations were obtained using the central composite design, and the accuracy of the calibrated parameters was validated through slope tests.
Review
Agricultural Engineering
Tobi Fadiji, Corne J. Coetzee, Tarl M. Berry, Alemayehu Ambaw, Umezuruike L. Opara
BIOSYSTEMS ENGINEERING
(2018)
Article
Agricultural Engineering
Tobi Fadiji, Tarl M. Berry, Corm J. Coetzee, Umezuruike Linus Opara
BIOSYSTEMS ENGINEERING
(2018)
Article
Agricultural Engineering
Otto C. Scheffler, Corne J. Coetzee, Umezuruike L. Opara
BIOSYSTEMS ENGINEERING
(2018)
Article
Agricultural Engineering
Tobi Fadiji, Alemayehu Ambaw, Come J. Coetzee, Tarl M. Berry, Umezuruike Linus Opara
BIOSYSTEMS ENGINEERING
(2018)
Article
Biotechnology & Applied Microbiology
T. M. Berry, A. Ambaw, T. Defraeye, C. Coetzee, Umezuruike Linus Opara
FOOD AND BIOPRODUCTS PROCESSING
(2019)
Article
Engineering, Chemical
C. J. Coetzee
Article
Food Science & Technology
Tobi Fadiji, Corne J. Coetzee, Tarl M. Berry, Umezuruike Linus Opara
FOOD PACKAGING AND SHELF LIFE
(2019)
Article
Biotechnology & Applied Microbiology
Tobi Facliji, Corne J. Coetzee, Umezuruike Linus Opara
FOOD AND BIOPRODUCTS PROCESSING
(2019)
Article
Engineering, Chemical
Corne Coetzee
Review
Engineering, Chemical
Corne J. Coetzee, Otto C. Scheffler
Summary: This paper discusses the application of the discrete element method (DEM) in simulating the behavior of granular materials, focusing on contact models for cohesive materials. It also critically reviews parameter calibration methods for cohesive materials. This provides engineers and researchers with a reference for selecting suitable models and calibration methods for their specific applications.
Article
Mathematics, Interdisciplinary Applications
Rhoda Ngira Aduke, Martin P. Venter, Corne J. Coetzee
Summary: Corrugated paperboard is a sandwich structure consisting of wavy paper (fluting) sandwiched between two flat paper sheets (liners). Due to its waved geometry, analyzing the entire package using three-dimensional numerical finite element models is computationally expensive. Homogenization techniques are used to evaluate equivalent homogeneous models with similar material properties. This study analyzes the application of three homogenization techniques and their effectiveness in evaluating the elastic material properties of corrugated paperboard, comparing them to the inverse method in modeling bending tests.
MATHEMATICAL AND COMPUTATIONAL APPLICATIONS
(2023)
Article
Mathematics, Interdisciplinary Applications
Johan Cillie, Corne Coetzee
Summary: Finite element analysis is a useful design tool for predicting load capacity of corrugated paperboard boxes, but it often underpredicts in-plane deformation. A study found that discrepancies in stiffness between experimental results and FEA can be attributed to imperfections in the panels and jig. Including initial imperfections and considering box complexities can improve accuracy in FEA models.
MATHEMATICAL AND COMPUTATIONAL APPLICATIONS
(2022)
Proceedings Paper
Agronomy
T. Fadiji, T. M. Berry, A. Ambaw, C. Coetzee, U. L. Opara
VII INTERNATIONAL CONFERENCE ON MANAGING QUALITY IN CHAINS (MQUIC2017) AND II INTERNATIONAL SYMPOSIUM ON ORNAMENTALS IN ASSOCIATION WITH XIII INTERNATIONAL PROTEA RESEARCH SYMPOSIUM
(2018)
Proceedings Paper
Agronomy
T. Fadiji, T. M. Berry, A. Ambaw, C. Coetzee, U. L. Opara
VII INTERNATIONAL CONFERENCE ON MANAGING QUALITY IN CHAINS (MQUIC2017) AND II INTERNATIONAL SYMPOSIUM ON ORNAMENTALS IN ASSOCIATION WITH XIII INTERNATIONAL PROTEA RESEARCH SYMPOSIUM
(2018)
Proceedings Paper
Agronomy
T. M. Berry, T. Defraeye, A. Ambaw, C. Coetzee, U. L. Opara
VII INTERNATIONAL CONFERENCE ON MANAGING QUALITY IN CHAINS (MQUIC2017) AND II INTERNATIONAL SYMPOSIUM ON ORNAMENTALS IN ASSOCIATION WITH XIII INTERNATIONAL PROTEA RESEARCH SYMPOSIUM
(2018)
