A Calibration Method for Contact Parameters of Maize Kernels Based on the Discrete Element Method

Clarifying the maize kernel movement during crushing process is critical for improving design and optimization of impact mill. Rather than through experiments, can be quantitatively analyzed discrete element method (DEM), this could contribute more to study mechanism equipment optimization. However, having an accurate particle model contact parameters are prerequisites ensure accuracy DEM simulation. In study, we proposed a construction Rocky simulation calibration calibrate parameters. The three-axis size, volume, shape information real kernels were obtained by 3D scanning, then was constructed section method. particle–low-carbon-plate (p–w) particle–particle (p–p) restitution coefficients calibrated using improved inclined surface drop addition, angle repose (AoR) discharging time considered together dynamical friction p–w p–p funnel Additionally, parameter values used in test test. maximum relative errors between measured 4.38% 6.98%, respectively, which further verified that methods feasible accurate. research novel idea applied granular materials with complex geometric structures, as well model, shows provide reference optimize