[1]李仁民,刘松玉,方磊,等.基于微观PNP多离子运移模型的多孔介质曲率系数分析[J].东南大学学报(自然科学版),2011,41(3):647-651.[doi:10.3969/j.issn.1001-0505.2011.03.041] 　Li Renmin,Liu Songyu,Fang Lei,et al.Tortuosity analysis of porous media based on micro-scale PNP multi-ions transport model[J].Journal of Southeast University (Natural Science Edition),2011,41(3):647-651.[doi:10.3969/j.issn.1001-0505.2011.03.041] 点击复制 基于微观PNP多离子运移模型的多孔介质曲率系数分析() 分享到： var jiathis_config = { data_track_clickback: true };

41

2011年第3期

647-651

2011-05-20

文章信息/Info

Title:
Tortuosity analysis of porous media based on micro-scale PNP multi-ions transport model

(东南大学岩土工程研究所,南京210096)
Author(s):
(Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China)

Keywords:

TU412
DOI:
10.3969/j.issn.1001-0505.2011.03.041

Abstract:
The tortuosity of porous media was studied by numerical analysis. PNP(Poisson-Nernst-Planck) multi-ions transport model at micro-scale is setup for describing ions transport in charged porous media, and tortuosity can be get by upscaling microscopic PNP multi-ions transport model. Numerical model on NaCl salt solution diffusion in the clay was built, and the relationship between the tortuosity and porosity, type of ions, background concentration of ion and surface charge density of particle was researched. For uncharged porous media, the relationship of the tortuosity to porosity is consistent with the exponential function of Archie’ Law and the tortuosity is independent from type of ions and background concentration of ion. On the contrary, for the charged porous media, the tortuosity is not only dependent on microstructure of porous media but also dependent on the porosity, type of ions, and background concentration of ion and surface charge density of particle. The tortuosity of cations in charged porous media is generally higher than in uncharged porous media, which is contrary to that of anions.

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