Abstract In the current study, the mixing of bi-disperse particles in a horizontal paddle mixer was investigated through the sampling experimental technique and discrete element method (DEM). LIGGGHTS software was employed as the DEM solver. A close agreement between the simulation and experimental data was observed. Using the calibrated DEM model, the influence of some operating parameters such as impeller rotational speed, vessel fill level, particle number ratio (rn) and particle loading arrangement on the mixing quality was analyzed. A detailed analysis of this specific type of mixer comprising bi-disperse particles has not been reported in literature. It was found that rn had the most significant effect on the mixing performance. It was also found that the diffusion mechanism was dominant over the convection mechanism and in the cases in which the values of the diffusion coefficients of 5 mm and 3 mm particles were close, the best mixing performance was achieved.

中文翻译：

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通过实验和 DEM 评估在卧式桨叶混合器中混合的双分散固体颗粒

摘要 在目前的研究中，通过采样实验技术和离散元法（DEM）研究了卧式桨叶混合器中双分散颗粒的混合。LIGGGHTS 软件被用作 DEM 求解器。观察到模拟和实验数据之间的密切一致性。使用校准后的DEM模型，分析了叶轮转速、容器液位、颗粒数比(rn)和颗粒加载布置等操作参数对混合质量的影响。文献中尚未报道这种包含双分散颗粒的特定类型混合器的详细分析。发现 rn 对混合性能的影响最显着。