Determining the impact of rectangular grain aspect ratio on tortuosity-porosity correlations of two-dimensional stochastically generated porous media

被引：19

作者：

Khabbazi, A. Ebrahimi ^{[1
]}

Hinebaugh, J. ^{[2
]}

Bazylak, A. ^{[3
]}

机构：

[1] Univ Toronto, Thermofluids Energy & Adv Mat TEAM Lab, Toronto, ON M5S 3G8, Canada

[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

[3] Univ Toronto, Fac Appl Sci & Engn, Toronto, ON M5S 3G8, Canada

来源：

SCIENCE BULLETIN | 2016年 / 61卷 / 08期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

Tortuosity; Porous media; Grain aspect ratio; Lattice-Boltzmann model; Stochastic simulation; LATTICE-BOLTZMANN SIMULATIONS; DIFFUSION-COEFFICIENT; NEGATIVE ELECTRODE; FIXED-BEDS; FLOW; PERMEABILITY; TRANSPORT; PERCOLATION; CONVECTION; PARAMETERS;

D O I：

10.1007/s11434-016-1020-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Tortuosity is an important parameter for characterizing transport properties within porous materials and is of interest in a broad range of fields, such as energy storage and conversion materials. One of the parameters that impacts the tortuosity value is the geometry of the solid phase which, in this study, is considered as stochastically-placed rectangular particles. Through lattice Boltzmann modelling (LBM), we determined the impact of particle aspect ratio on the intrinsic tortuosity-porosity relationships of two-dimensional porous media composed of rectangular particles. These relationships were isolated for materials with grain (particle) aspect ratios of is an element of {1, 2, 3} and porosities from [0.55 - 0.95]. We determined that a minimum of 6, 8 and 10 stochastic simulations, respectively, were required to calculate these average tortuosity values in laminar flow (Re << 1). This novel application of the LBM to study the effects of porosity and aspect ratio of rectangular grains on tortuosity can be used in the tailoring of materials for clean energy.

引用

页码：601 / 611

页数：11

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