计算跨越多个长度尺度的多孔域中毛细管压力函数和饱和渗透率的高效方法

IF 2.7 3区 工程技术 Q3 ENGINEERING, CHEMICAL
Dominik Becker, Konrad Steiner, Stefan Rief
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引用次数: 0

摘要

本文介绍了一种计算包含多个长度尺度的几何体的毛细管压力函数和饱和渗透率的方法。该方法不需要较小长度尺度的精确几何图形。相反,它需要有效的两相流动参数。它通过生成在选定毛细管压力值下形成静态平衡的相分布来实现这一点,类似于孔隙形态学方法。在多孔材料内部,有效参数用于获得相应的相饱和度。图中展示了如何在跨越多个长度尺度的几何体中使用这些相分布来计算毛细管压力函数和与饱和度相关的渗透率。该方法在包含简单各向同性多孔材料的几何图形上进行了测试,并应用于液体复合材料成型过程中的复杂纺织品叠层几何图形。在这种几何形状中,可以区分三种不同的长度尺度。纺织品堆栈的有效两相流参数是通过提出的方法计算得出的,避免了昂贵的模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

An Efficient Method to Compute Capillary Pressure Functions and Saturation-Dependent Permeabilities in Porous Domains Spanning Several Length Scales

An Efficient Method to Compute Capillary Pressure Functions and Saturation-Dependent Permeabilities in Porous Domains Spanning Several Length Scales

A method for calculating capillary pressure functions and saturation-dependent permeabilities of geometries containing several length scales is presented. The method does not require the exact geometries of the smaller length scales. Instead, it requires the effective two-phase flow parameters. It does this by generating phase distributions that form static equilibria at a selected capillary pressure value, similar to pore-morphology methods. Within a porous material, the effective parameters are used to obtain the corresponding phase saturation. It is shown how these phase distributions can be used in geometries spanning several length scales to calculate the capillary pressure function and saturation-dependent permeabilities. The method is tested on a geometry containing a simple isotropic porous material and it is applied to a complex textile stack geometry from a liquid composite molding process. In this geometry, three different length scales can be distinguished. The effective two-phase flow parameters of the textile stack are calculated by the proposed method, avoiding expensive simulations.

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来源期刊
Transport in Porous Media
Transport in Porous Media 工程技术-工程:化工
CiteScore
5.30
自引率
7.40%
发文量
155
审稿时长
4.2 months
期刊介绍: -Publishes original research on physical, chemical, and biological aspects of transport in porous media- Papers on porous media research may originate in various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering)- Emphasizes theory, (numerical) modelling, laboratory work, and non-routine applications- Publishes work of a fundamental nature, of interest to a wide readership, that provides novel insight into porous media processes- Expanded in 2007 from 12 to 15 issues per year. Transport in Porous Media publishes original research on physical and chemical aspects of transport phenomena in rigid and deformable porous media. These phenomena, occurring in single and multiphase flow in porous domains, can be governed by extensive quantities such as mass of a fluid phase, mass of component of a phase, momentum, or energy. Moreover, porous medium deformations can be induced by the transport phenomena, by chemical and electro-chemical activities such as swelling, or by external loading through forces and displacements. These porous media phenomena may be studied by researchers from various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering).
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