Naslov
Numerical model for multi‐ion diffusion in cementitious materials – MultIDiff CODE

Autori
Ukrainczyk, Neven ; Koenders, Eduardus ; van Breugel, Klaas

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
MATRIB 2013 International conference on materials, tribology, recycling : zbornik radova = conference proceedings / Alar, Ž. ; Jakovljević, S. ; Šolić, S. - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2013, 411-420

Skup
MATRIB 2013 International conference on materials, tribology, recycling

Mjesto i datum
Vela Luka, Hrvatska, 27.06.2013. - 29.06.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
numerical model; cementitious materials; durability; ionic diffusion

Sažetak
Transport processes in cementitious materials play a crucial role in both the degradation process of building materials as well as in the containment of hazardous wastes. It is known that modeling of the ionic diffusion through cementitious materials by a plain (unmodified) Fick’s law is inappropriate and requires a different approach. In this paper a numerical platform called MultIDiff (Multi‐ionic Diffusion) is presented for solving a complex system of nonlinear Nernst‐Planck equations for the diffusion of ions through cementitious materials that considers electrical coupling between several diffusive ions. Novelty of the MultIDiff approach is in its advanced numerical implementation employing Matlab’s built‐in solvers. The MultIDiff is dedicated to predict concentration profiles and fluxes for each ion and the resulting potential distribution through the cementitious material, and provides a good convergence rate. Furthermore, it is robust enough to handle non‐linearity and the couplings of the equations, and resents a more reliable way to obtain long term durability predictions of cementitious materials.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Građevinarstvo, Kemijsko inženjerstvo

POVEZANOST RADA