A stochastic microstructure model based on a random Laguerre tessellation is used to simulate virtual open cell foam structures. Both circular cylindric and concave triangular strut cross section shapes are considered. Additional geometry modifications are introduced by relaxation of the tessellation cells using the Surface Evolver software and by closing a certain percentage of the foam windows. The effect of these modifications on the foams' permeabilities is investigated. In particular, permeability anisotropies resulting from anisotropic closing of the windows are taken into account. The dimensionless permeability (Darcy number) in the different directions is well explained by regression models using porosity, geometric tortuosity, and constrictivity as explanatory variables.

中文翻译：

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几何形状修改对开孔泡沫渗透性的影响

基于随机拉盖尔镶嵌的随机微观结构模型用于模拟虚拟开孔泡沫结构。圆柱和凹三角形支柱横截面形状都被考虑在内。通过使用 Surface Evolver 软件放松镶嵌单元并关闭一定百分比的泡沫窗口，可以引入额外的几何修改。研究了这些改性对泡沫渗透性的影响。特别地，考虑了由窗口的各向异性关闭导致的渗透率各向异性。使用孔隙度、几何曲折度和收缩度作为解释变量的回归模型很好地解释了不同方向的无量纲渗透率（达西数）。