Electrodiffusion in porous media

Abstract

ABSTRACT A macroscopic modelling of the chloride transport through saturated cement-based materials is carried out by using the periodic homogenization technique. The dimensional analysis of Nernst-Planck equation leads to dimensionless parameters characterizing the problem. Given the electrical field applied in the experimental validation, the asymptotic expansion of Nernst-Planck equation leads to a macroscopic model only involving migration. From this analysis, a classical experimental procedure allows obtaining the homogenized diffusion coefficient.