Taylor dispersion in porous media. Determination of the dispersion tensor

• DOI: 10.1063/1.858751
• Publication Date: 2002-07-26T12:24:03Z
• Authors: J. Salles; J.-F. Thovert; R. Delannay; L. Prevors; J.-L. Auriault; P. M. Adler
• Keywords: Taylor dispersion

In homogeneous porous media, the analytical expression of dispersion tensor D* can be calculated by method moments and a multiple scale expansion; symmetric component this is identical in both cases. Numerically, computed two methods, namely B equation random walks. The media are modeled as being spatially periodic; determined function Péclet number for four types unit cells: deterministic, fractal, random, reconstructed. A systematic comparison made with existing numerical experimental data. long time behavior, its Gaussian limit, documented.