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Diffusive transport in disordered media. Application to the determination of the tortuosity and the permeability of cracked materials.

  • Luc Dormieux
  • Djimedo Kondo
Part of the CISM International Centre for Mechanical Sciences book series (CISM, volume 480)

Abstract

This Chapter deals with molecular diffusion in saturated porous media. It provides a micromechanical basis to the phenomenological concept of tortuosity which is classically introduced in order to capture the barrier effect of the solid-fluid interface. Various Eshelby-based estimates of the effective diffusion tensor are derived in the isotropic case. The influence of cracks on the tortuosity is also investigated. Finally, it is shown that the permeability of a cracked porous medium can be estimated with the help of the same mathematical tools.

Keywords

Porous Medium Effective Diffusion Coefficient Solid Volume Fraction Uniform Boundary Condition Macroscopic Permeability 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© CISM, Udine 2005

Authors and Affiliations

  • Luc Dormieux
    • 1
  • Djimedo Kondo
    • 2
  1. 1.Ecole Nationale des Ponts et ChausséesFrance
  2. 2.Laboratoire de Mécanique de LilleLille University of TechnologyFrance

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