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- W2012194615 abstract "We present an analytical expression for the shear dispersion during solute transport in a coupled fracture–matrix system. The dispersion coefficient is obtained in a fracture with porous walls by taking into account an accurate boundary condition at the interface between the matrix and fracture, and the results were compared with those in a non-coupled system. The analysis presented identifies three regimes: diffusion-dominated, transition, and advection-dominated. The results showed that it is important to consider the exchange of solute between the fracture and matrix in development of the shear dispersion coefficient for the transition and advection-dominated regimes. The new dispersion coefficient is obtained by imposing the continuity of concentrations and mass fluxes along the porous walls. The resulting equivalent transport equation revealed that the effective velocity in a fracture increases while the dispersion coefficient decreases due to mass transfer between the matrix and fracture. A larger effective advection term leads to greater storage of mass in the matrix as compared with the classical double-porosity model with a non-coupled dispersion coefficient. The findings of this study can be used for modeling of tracer tests as well as fate, transport, and remediation of groundwater contaminants in fractured rocks." @default.
- W2012194615 created "2016-06-24" @default.
- W2012194615 creator A5005211436 @default.
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- W2012194615 date "2014-12-01" @default.
- W2012194615 modified "2023-10-16" @default.
- W2012194615 title "Shear dispersion in a fracture with porous walls" @default.
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- W2012194615 doi "https://doi.org/10.1016/j.advwatres.2014.08.005" @default.
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