Void fraction for random loose packing of the cylindrical particles considering filling rate,material and shape
作者机构：School of Mechanical EngineeringTongji UniversityShanghaiChina
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2022年第20卷第4期
页 面：35-46页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：This work was supported by the China National Key R&D Program during the 13th Five-year Plan Period(grant number 2018YFC0705300) the National Natural Science Foundation of China(grant number 52078354).
主 题：Void fraction Random loose packing Cylindrical particles Prediction model DEM
摘 要：Particle packing is widely applied in organic pollutant adsorption,catalytic reaction.biomass combustion,nuclear cooling,and other scenarios.Due to the complexity of the shape,the studies on the void fraction of the cylindrical particles are not as thorough as the spherical particles.This study investigated the influence of the flling rate,material properties and sphericity on the void fraction of cylinders through experiments and simulation.DEM(discrete element method)was validated by the internal structures of the packing obtained by CT(computed tomography).Based on the logarithmic correlation between the void fraction and flling rate,an ingenious framework for predicting the void fraction of cylindrical particles was presented with two intermediate coefficients.By correlating the coefficients with the material property and sphericity,a novel void-fraction prediction model was established with R-squared of 0.996.The mechanism of void fraction under random loose packing for cylinders was eventually found in this study.
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