Influence of particulate geometry on permeability of porous materials
Influence of particulate geometry on permeability of porous materials
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DOI：
10.1016/j.powtec.2019.01.064
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发表时间：
2019-03-01
影响因子：
5.2
通讯作者：
Kumar, Aditya
中科院分区：
文献类型：
--
作者：
Banala, Ajaybabu;Ma, Hongyan;Kumar, Aditya
多孔材料的耐久性--尤其是暴露在有害环境中时--取决于它们的渗透性。本文详细研究了流体在多孔介质中流动的控制方程，并研究了颗粒几何形状对多孔材料液水渗透性的影响。使用三维(3D)微结构模型来生成材料的3D微结构。评价了具有单一或二元组合几何形状(即球形、立方/立方体、圆柱形和不规则)的颗粒以及广泛的孔隙率和颗粒数量的微观结构，以阐明它们对渗透率的影响。采用基于格子Boltzmann方法(LBM)的数值模型，以多孔材料的三维微观结构为输入，计算了多孔材料的渗透率。从LBM模拟获得的结果表明渗透性显著地受颗粒的几何形状的影响--特别是当孔隙率低和/或微结构中的颗粒数量较小时(例如，
The durability of porous materials - especially when exposed to deleterious environs - depend on their permeability. This paper takes a closer look at the governing equations of fluid flow in porous media, and examines the role of particulate geometry on liquid water permeability of porous materials. A three dimensional (3D) micro-structural model is used to generate 3D microstructures of the materials. Microstructures featuring particulates with single or binary combination of geometries (i.e., spherical, cubical/cuboidal, cylindrical, and irregular), and a wide range of porosities and particulate numbers, are evaluated to elucidate their influence on permeability. A numerical model based on the lattice Boltzmann method (LBM) is used to calculate permeability of porous materials using their 3D microstructures as inputs. Results obtained from the LBM simulations show that permeability is significantly affected by geometry of the particulates - especially when the porosity is low and/or the number of particulates in the microstructure is small (e.g.,