Statistical variation of characteristics of random packed beds of Raschig rings:The influence of the sample size
作者机构：Czestochowa University of TechnologyDepartment of Thermal Machineryal.Armii Krajowej 2142-200 CzestochowaPoland
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2021年第19卷第3期
页 面：50-61页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：The investigation was supported by National Science Centre(Poland)under the Grant No.UMO-2018/31/D/ST8/00199 Ministry of Science and Higher Education(Poland)is gratefully acknowledged for providing the scholarship for young outstanding scientists No.STYP/15/0246/E-358/2020 to dr PawełNiegodajew
主 题：Random packing Raschig rings Full cylinders Particle orientation Porosity Reproducibility
摘 要：Many studies on random packed beds have been dedicated to local porosity(void fraction)or orientation distribution of ***,despite the random nature of the considered packings,very little attention has been devoted to examination whether the number of particles used in experiments/simulations is sufficiently large to get reproducible *** reproducibility of the key packing parameters depends on the size of the population of particles(sample size)and ordering effects induced by the confining *** work investigates quantitatively the influence of the sample size on the statistical variation of the packed bed *** beds of Raschig rings were generated with a sequential algorithm and three column diameters were *** has been found that in the case of the orientation distribution the results depend strongly on the sample size,especially for slender columns,while the porosity profiles are well-reproducible characteristics even for relatively small packings of *** complementary results for full cylinders are also included.
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