A mixed finite element discretization scheme for a concrete carbonation model with concentration-dependent porosity

作者：Radu Florin A^*; Muntean Adrian; Pop Iuliu S; Suciu Nicolae; Kolditz Olaf

来源：Journal of Computational and Applied Mathematics, 2013, 246: 74-85.

DOI：10.1016/j.cam.2012.10.017

• Coupled reactive transport
• Convergence analysis
• Carbonation

We investigate a prototypical reaction-diffusion-flow problem in saturated/unsaturated porous media. The special features of our problem are twofold: the reaction produces water and therefore the flow and transport are coupled in both directions and moreover, the reaction may alter the microstructure. This means we have a variable porosity in our model. For the spatial discretization we propose a mass conservative scheme based on the mixed finite element method (MFEM). The scheme is semi-implicit in time. Error estimates are obtained for some particular cases. We apply our finite element methodology for the case of concrete carbonation-one of the most important physico-chemical processes affecting the durability of concrete.

• 出版日期2013-7