Standardized Friction Experiment for Parameter Determination of Discrete Element Method and Its Validation Using Angle of Repose and Hopper Discharge
Tóm tắt
The discrete element method (DEM) is the most common computational approach to simulate the dynamic behavior of powder. The material properties used in DEM simulation strongly affect its results. Among these material properties, it is difficult to measure the exact values of friction coefficients, including static and rolling friction coefficients, because they differ according to environmental conditions and other material properties such as particle size, particle shape, and roughness of vessel walls. In this study, four standardized experiments are performed to measure the static and rolling friction coefficients between particles and a vessel. The accuracy of the measured friction coefficients is confirmed using the repose angle and the discharge velocity of a hopper. DEM simulation is performed using the measured friction coefficients, and the results show excellent agreement with experimental results.
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