Abstract
Abstract Using the discrete element method to investigate the behavior of particles is a crucial strategy in the research and development of novel equipment. Green pepper (Zanthoxylum armatum) is a globally renewable plant-derived medicinal and food homologous commodity with a wide range of uses and great demand, but the mechanical properties needed to develop its processing equipment are scarce. Thus, this case study aimed to systematically explore the necessary input parameters to model green pepper, and to provide new insights for the guidance of future industrial applications worldwide. On the basis of the experimental measured physical properties, the contact properties of green pepper on zinc-coated steel were first calibrated and then used to determine the contact properties between particles. The differences between the experimental and simulation results were analyzed for selection and verification of the contact properties accurately. Difference analysis confirmed that the coefficient of restitution, coefficient of static friction and coefficient of rolling friction for contact between the particle and zinc-coated steel have values of 0.392, 0.650, and 0.168, and those coefficients for particle-to-particle contact have values of 0.199, 0.710, and 0.184, respectively. Discoveries in this work may contribute to the research and development of production equipment for green pepper.
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