This paper presents the numerical study to examine characteristics of fluid flow and
solute transport in a rough fracture subject to effective normal stresses. The aperture
distribution is generated by using the self-affine fractal model. In order to represent
a nonlinear relationship between the supported normal stress and the fracture
aperture, we combine a simple mechanical model with the local flow model. The solute
transport is simulated using the random walk particle following algorithm. Results of
numerical simulations show that the flow is significantly affected by the geometry of
aperture distribution varying with the effective normal stress level while it is
slightly affected by the fractal dimension that determines the degree of the fracture
surface roughness. However, solute transport is influenced by the effective normal
stress as well as the fracture surface roughness.
