Publication: Research - peer-review › Journal article – Annual report year: 2008
The Poisson-Nernst-Planck (PNP) equations are applied to model the migration test. A detailed analysis of the equations is presented and the effects of a number of common, simplifying assumptions are quantified. In addition, closed-form solutions for the effective chloride diffusivity based on the full PNP equations are derived, a number of experiments are analyzed in detail, and a new, truly accelerated migration test is proposed. Finally, we present a finite element procedure for numerical solution of the PNP equations.
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- diffusion, analytical solution, Poisson-Nernst-Planck, numerical analysis, chloride, migration test, cement, PNP, electro-diffusion