Compaction effects on permeability of spherical packing
Compaction effects on permeability of spherical packing
复制标题
压实对球形填料渗透性的影响
DOI：
10.1108/ec-01-2020-0015
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发表时间：
2020-05
影响因子：
1.6
通讯作者：
Moran Wang
中科院分区：
文献类型：
--
作者：
Duzhou Zhang;Zhiguo Tian;Zhiqiang Chen;Dengyun Wu;Gang Zhou;Shaohua Zhang;Moran Wang
目的：本文的目的是通过孔隙模型研究球形填料在冷压过程中渗透率的变化。设计/方法/途径：采用离散元法（DEM）生成不同压缩压力下的球形堆积结构，采用格子玻尔兹曼法（LBM）计算每个球形组装体的渗透率。研究结果：研究发现，孔隙度的降低是在压缩初期渗透率降低的主要原因，但在压缩后期其影响变得不足。此外，还得到了渗透率与等效平均直径的关系以及归一化渗透率随压力变化的经验公式。研究限制/影响。在这项研究中，作者研究了球形颗粒，忽略了非球形的影响。此外，离散元法采用经典的接触模型--线性弹簧阻尼模型，无法考虑塑性变形。独创性/价值。DEM和LBM很好地结合起来，研究球形填料的渗透性的压实效果。首次给出了直径均匀分布的球形填料结构的两个简单表达式。
Purpose.The purpose of this paper is to investigate the evolution of the permeability of spherical packing during cold compaction by pore-scale modeling..Design/methodology/approach.The discrete element method (DEM) is used to generate spherical packing structure under different compressive pressures and the Lattice Boltzmann method (LBM) is adopted to calculate the permeability of each spherical assembly..Findings.It is found that the decrease of the porosity is the main reason of the reduction in permeability in the initial compression stage, but its influence becomes insufficient in the late compression stages. Besides, two empirical formulas are obtained, which describe the relation between the permeability and the equivalent mean diameter and the variation of normalized permeability with compressive pressure, respectively..Research limitations/implications.In this study, the authors study the spherical particles and ignore the non-spherical effects. Besides, the classical contact model, the linear-spring-damping model, is used in DEM, so the plastic deformation cannot be considered..Originality/value.The DEM and the LBM are well combined to study the compaction effects on permeability of spherical packing. Two simple expressions of the spherical packing structure with uniform diameter distribution are given for the first time.
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