Physics – Fluid Dynamics
Scientific paper
2009-05-10
Physics
Fluid Dynamics
17 pages
Scientific paper
The objective of this article is to highlight certain features of a number of coefficients that appear in models of phenomena of transport in anisotropic porous media, especially the coefficient of dispersion, the 2nd rank tensor D_{ij}, and the dispersivity coefficient, the 4th rank tensor a_{ijkl}, that appear in models of solute transport. Although we shall focus on the transport of mass of a dissolved chemical species in a fluid phase that occupies the void space, or part of it, the same discussion is also applicable to transport coefficients that appear in models that describe the advective mass flux of a fluid and the diffusive transport of other extensive quantities, like heat. The case of coupled processes, e.g. the simultaneous transport of heat and mass of a chemical species, are also considered. The entire discussion will be at the macroscopic level, at which a porous medium domain is visualized as homogenized continuum.
Bear Jacob
Fel Leonid G.
Zimmels Yoram
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