Characterization of artificial spherical particles for DEM validation studies
Characterization of artificial spherical particles for DEM validation studies
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DOI：
10.1016/j.partic.2011.10.007
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发表时间：
2012-04-01
期刊：
影响因子：
3.5
通讯作者：
Wood, David Muir
中科院分区：
文献类型：
--
作者：
Cavarretta, Ignazio;O'Sullivan, Catherine;Wood, David Muir
本文介绍了一项研究，其中先进的颗粒尺度表征进行了球形颗粒，可用于实验测试，以验证离散元法（DEM）模拟。两种类型的颗粒，碱性和硼硅酸盐玻璃珠，由两种不同的材料制成，被认为是。测量了颗粒形状、刚度、接触摩擦性能和表面粗糙度。考虑了硬度和粗糙度对颗粒力学响应的影响。与碱性珠相比，硼硅酸盐珠更球形，尺寸更均匀，并且它们表现出更接近天然石英砂的力学特性。虽然只有两种材料类型进行了研究，这项工作具有更广泛的意义，作为一种方法，用于选择适合用于DEM研究的颗粒，并强调了在选择过程中应考虑的关键参数。(C)2012中国科学院颗粒学会、过程工程研究所。Elsevier B.V.出版，保留所有权利。
This paper describes a study in which advanced particle-scale characterization was carried out on spherical particles that can be used in experimental tests to validate discrete element method (DEM) simulations. Two types of particle, alkaline and borosilicate glass beads, made from two different materials, were considered. The particle shape, stiffness, contact friction properties and surface roughness were measured. The influences of hardness and roughness on the mechanical response of the particles were carefully considered. Compared to the alkaline beads, the borosilicate beads were more spherical and more uniform in size, and they exhibited mechanical characteristics closer to natural quartz sand. While only two material types were studied, the work has the broader implication as a methodology for selecting particles suitable for use in DEM studies and the key parameters that should be considered in the selection process are highlighted. (C) 2012 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.