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- W2243595810 abstract "Mechanical dispersion is the term used to describe the spreading of a contaminant as it is transported through a porous medium by advection. In the dispersion-advection equation, mechanical dispersion is taken into account by treating it in a way that is analogous to molecular diffusion, so that the effective diffusion coefficient and the mechanical dispersion coefficient are added together, the sum being referred to as the hydrodynamic dispersion coefficient. Typically, the hydrodynamic dispersion is taken as a constant. In this paper it is shown that this maybe misleading, particularly at an inlet boundary. A more accurate method is to vary the mechanical dispersion spatially so that it is zero at the inlet boundary. The resulting difference can be very large (over 1000%) and cause incorrect contaminant profiles, mass flow rates, and breakthrough times." @default.
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- W2243595810 date "1999-01-01" @default.
- W2243595810 modified "2023-09-23" @default.
- W2243595810 title "Modelling of the Dispersion-advection Equation with Spatially Varying Mechanical Dispersion" @default.
- W2243595810 hasPublicationYear "1999" @default.
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