Objectives :
Model the gradient in alteration observed in percolation experiments (Fig. 1b, T2.3, T2.4)
Description of planned work :
The simulation will be based on the 1D Eulerian thermokinetic hydrochemical code KIRMAT, which has been used successfully to model granite alteration. KIRMAT implements theoretical kinetic rate laws for mineral dissolution and precipitation based on the Transition State Theory (TST) and can be adapted to model the advancement of reactions identified in (…)

Objectives : Model particle transport along complex 2D fracture networks
Description of planned work : The properties of the networks in terms of density of fractures and geometrical properties of the fractures (length, aperture, and orientation) will be defined from statistics present in the literature and from those provided by Task T1.2. Fluid flow and solute transport will be simulated in the networks considering (i) incompressible fluid in the fractures described with the local (…)

Objectives :
Model in 3D the effect of stress on the advancement of alteration
Description of planned work :
Discrete Element Modeling (DEM) can model the evolution of fractures under deviatoric and isotropic stress. The Yade software developed by F. Donzé is a reference open-source DEM code. Recent addition of fluid-flow description in the formulation of the DEM allows to monitor permeability. These simulations will be adapted to derive laws relating permeability, flow, time and (…)