Particle motion in a screw conveyor was simulated with the discrete element method. The particle flow behavior and transport processes at different screw rotating speeds and filling levels were investigated in this study. The spatial distributions of particle velocity were predicted. The predicted mass flow rate increased with increasing screw rotating speed and filling level. The contact forces and granular temperatures of particles were also calculated. The simulation results showed that the translational granular particle temperatures were higher than the rotational granular particle temperatures. In addition, the configurational temperatures of particles were calculated from simulated instantaneous particle overlaps, and results indicated that deformation of elastic particles contributed to the rate of energy dissipation. Good agreement between the numerical simulation and experimental results was achieved in this study.

使用离散元方法模拟了螺旋输送机中的粒子运动。在这项研究中，研究了在不同的螺杆转速和填充水平下的颗粒流动行为和传输过程。预测了粒子速度的空间分布。预测的质量流率随着螺杆转速和填充量的增加而增加。还计算了颗粒的接触力和颗粒温度。仿真结果表明，平移颗粒温度高于旋转颗粒温度。另外，由模拟的瞬时粒子重叠计算了粒子的构型温度，结果表明弹性粒子的变形有助于能量的耗散率。