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A numerical study of fluid flow and solute transport in a variable-aperture fracture using geostatistical method
This paper presents the numerical studies for the fluid flow and solute transport in a variable-aperture fracture, generated by using the geostatistical method (turning band method). In order to represent the dependence between the effective normal stress and the geometry of aperture distribution, we combined a simple mechanical model with the flow model. The solute transport was simulated using the particle following algorithm. As the results obtained from these numerical simulations, the fracture permeability depended strongly on the fracture roughness and zones in contact, which are varied with the effective normal stress. In comparison between the spatial correlation lengths λ/L=0.2 and 0.4, the fracture with λ/L=0.4 was more permeable than that with λ/L=0.2. The particle displacement depended also on the variation of the fracture roughness and zones in contact according to the effective normal stress. The most efficient path for flow was varied with the effective normal stress. However, from a certain value of the effective normal stress, for example 11.95 MPa in this study, this path maintains almost the same form. Moreover the particles displaced only along reduced channels (i.e. one or two channels) and the spatial dispersion of particles becomes thus constant.
A numerical study of fluid flow and solute transport in a variable-aperture fracture using geostatistical method
This paper presents the numerical studies for the fluid flow and solute transport in a variable-aperture fracture, generated by using the geostatistical method (turning band method). In order to represent the dependence between the effective normal stress and the geometry of aperture distribution, we combined a simple mechanical model with the flow model. The solute transport was simulated using the particle following algorithm. As the results obtained from these numerical simulations, the fracture permeability depended strongly on the fracture roughness and zones in contact, which are varied with the effective normal stress. In comparison between the spatial correlation lengths λ/L=0.2 and 0.4, the fracture with λ/L=0.4 was more permeable than that with λ/L=0.2. The particle displacement depended also on the variation of the fracture roughness and zones in contact according to the effective normal stress. The most efficient path for flow was varied with the effective normal stress. However, from a certain value of the effective normal stress, for example 11.95 MPa in this study, this path maintains almost the same form. Moreover the particles displaced only along reduced channels (i.e. one or two channels) and the spatial dispersion of particles becomes thus constant.
A numerical study of fluid flow and solute transport in a variable-aperture fracture using geostatistical method
KSCE J Civ Eng
Jeong, Woo-Chang (author) / Cho, Yong-Sik (author) / Song, Jai-Woo (author)
KSCE Journal of Civil Engineering ; 5 ; 357-369
2001-12-01
13 pages
Article (Journal)
Electronic Resource
English
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