Numerical study of reaction-mineralogy-porosity changes in porous media

摘要

We develop a one-dimensional, nonlinear, nonlocal model that governs the advection and dispersion of a chemical solute that reacts with a porous, mineral fabric to produce a change in porosity and a change in mineralogy. The flow is either driven by a pressure gradient, consistent with Darcy's law, or an imposed boundary velocity. Constitutive equations based on geometric considerations relate volume changes to the replacement reactions that occur. Numerical methods are used to analyze the behavior of the system.