Abstract Pore resolved simulations are performed to study the mean flow characteristics in porous media formed by random distribution of impermeable and permeable particles. Permeability of the medium and reactive surface areas are analyzed for a range of solid fractions, packing patterns and flow rates. The results are compared with models presented in the literature and with simulations of flow through ordered packings. Permeability of a randomly packed porous medium is found to depend on the heterogeneous distribution of porosity which results from particle agglomeration and is typically ignored by simpler models. The reactive surface area is dependent on the flow field at pore scale in addition to geometry. Moreover, the wake formed downstream of the particles at moderately high flow rates also affects the reactive surface area. Similar analysis is also performed by assuming particles to be permeable to account for dual scale porosity relevant for various engineering applications.

中文翻译：

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使用孔隙解析模拟通过随机填充的不可渗透和可渗透颗粒的流动特性

摘要 孔隙解析模拟是为了研究由不透水和可透水颗粒随机分布形成的多孔介质中的平均流动特性。分析介质和反应表面积的渗透性，以了解一系列固体成分、填充模式和流速。将结果与文献中提供的模型和通过有序填料的流动模拟进行比较。发现随机填充的多孔介质的渗透率取决于由颗粒团聚引起的孔隙率的不均匀分布，并且通常被更简单的模型忽略。除了几何形状外，反应表面积还取决于孔隙尺度的流场。此外，在中等高流速下在颗粒下游形成的尾流也会影响反应表面积。