Abstract
The transportation of granular materials is commonly achieved through pneumatic conveying. In this study, the multiphase particle-in-cell model was adopted to investigate the dense phase pneumatic conveying in a vertical pipe. The simulation results were consistent with experimental data, with an error of less than 4%. The study examined the effects of varying particle size distribution (PSD), pipe diameters, and superficial gas velocities on the flow field and particle characteristics in this process. The findings revealed that the largest dispersion coefficient of particles was along the conveying direction. PSD has slight effect on dispersion coefficients. However, when the superficial gas velocity is increased from 1 m/s to 2.5 m/s, particle dispersion coefficients increases by approximately 115.22%. Formation and evolution of the plug can be observed during the pneumatic conveying process. PSD has a limited influence on particle slip velocity, but affects the particle Reynolds number.
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