Modelling Of Diffusion In Porous Structures
Author(s)
E. du Plessis & S. Woudberg
Abstract
An existing pore-scale model is used to predict the effective diffusivity of
staggered two-dimensional rectangular unconsolidated arrays through the use of
a Representative Unit Cell concept. A tri-diagonal matrix algorithm is used to
solve the diffusive flux field and to compute the effective diffusion coefficient for
concentration gradients of staggered arrays. The numerical results and analytical
model are compared critically with theoretical and numerical studies, as well as
experimental data reported in literature. The good correlations obtained for the
effective diffusivity provide confidence in both the computational and analytical
work.
Keywords: diffusion, porous media, pore-scale, effective diffusion coefficient,
modelling, microstructure, fibres.
Keywords
diffusion, porous media, pore-scale, effective diffusion coefficient,
modelling, microstructure, fibres
Related Book
Other papers in this volume
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