1. Permeability variations by changes in geometrical conditions.
- Author
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Shin, Changhoon
- Subjects
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PERMEABILITY , *POROSITY , *COMPUTER simulation , *CRYSTAL structure , *RELIABILITY in engineering - Abstract
Permeability variation in ground formation, which is caused by the changes in geometrical conditions, has attracted a significant amount of attention in various industrial applications. However, a practical and reliable method has not been proposed yet owing to the extremely complex grain shapes, micron-scale pore paths, lack of reliable testing apparatus, and methods that further complicate its practical implementation. Therefore, the pore-scale simulation (PSS) method was adopted herein to examine the permeability variation characteristics of changes in the geometrical conditions with a focus on their correlations with key geometrical variables. Two kinds of PSS series models, i.e., five simple and four complex structured porous media, were built and analyzed to investigate the permeability variation aspects according to the changes in geometrical conditions. Consequently, the fundamental relation between permeability variation and key geometrical variables, such as specific surface area, porosity, and bulk volume, were successfully presented. Particularly, the relations between the two practical permeability variations as the respective functions of either the specific surface area or porosity, coupled with changes in the bulk volume, were derived and verified by analyzing both PSS models. In conclusion, the reliability of the derived relations for various kinds of porous flow analyses accompanying geometrical changes was checked. Moreover, it was shown that the permeability variations by changes in the geometrical conditions are better correlated with specific surface area and bulk volume but are scarcely expressed as a sole function of porosity. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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