Abstract
Most particles in industrial applications are mixed cylindrical particles with the same diameter and different aspect ratios (ARs). In this study, the void fraction of packed bed with binary, ternary, quaternary, and quintuple mixtures of cylindrical particles is explored by discrete element method (DEM). The concept of equivalent AR is proposed for predicting void fraction of packing of mixed cylindrical particles based on previous research. Results show that (1) the correlation between equivalent AR and void fraction is higher when ARVave is used, and the prediction error is only −0.57%–6.21%. (2) Better prediction results can be obtained using ARNave in some cases, such as for packing of mixed cylindrical particles with small AR intervals and wide distribution. However, the prediction results are unsatisfactory in the case of larger AR intervals and cylindrical particles with AR = 1. (3) The R2 can be increased to 0.983 when corrected by multiplying by 96.87%.
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