Improving permeability prediction for fibrous materials through a numerical investigation into pore size and pore connectivity
Improving permeability prediction for fibrous materials through a numerical investigation into pore size and pore connectivity
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DOI：
10.1016/j.powtec.2009.05.012
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发表时间：
2009-10
影响因子：
5.2
通讯作者：
T. Donohue;C. Wensrich
中科院分区：
文献类型：
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作者：
T. Donohue;C. Wensrich
传统的Kozeny-Carman方程的不规则的颗粒形状，如那些发现在纤维材料中的应用程序的渗透率估计不佳，由于两个因素;不充分的描述的空隙大小和没有考虑的孔隙连通性。形状因子被用来试图描述空隙尺寸，但对于这种类型的颗粒失败，因为它只能凭经验而不是从其定义中找到。传统的Kozeny-Carman方程的使用还包括材料的弯曲度的恒定值，其表示空隙的连通性，而弯曲度应该是根据颗粒的形状和填充程度而变化的变量。在这项研究中，这两个因素进行了研究，通过数值模拟，以获得一个更好的理解的孔隙空间和孔隙连通性的渗透率的预测中的作用。
The application of the traditional Kozeny–Carman equation to irregular particle shapes such as those found in fibrous materials results in a poor estimation of the permeability due to two factors; inadequate description of the void size and no accounting of the pore connectivity. A shape factor is used to attempt to describe the void size but fails for this type of particle as it can only be found empirically rather than from its definition. The use of the traditional Kozeny–Carman equation also includes a constant value for the tortuosity of a material, which represents the connectivity of the voids, whereas the tortuosity should be a variable that changes depending on the shape of the particle and the degree of packing. These two factors are investigated in this study via numerical simulations to obtain a greater understanding of the role of void space and void connectivity in the prediction of permeability.