Fluid-solid interaction under the multiphase flow conditions: a pore-scale perspective

Fluid-solid interactions under multiphase flow conditions in porous media are frequently encountered in systems that are relevant to practices including geological carbon storage, hydraulic fracturing, and oil recovery. Chemical reactions such as mineral dissolution and precipitation can affect fluid migration and solute transport significantly. Knowledge of the pore-scale dynamics and heterogeneity is critical for evaluating continuum scale properties. In this study, we developed a pore-scale numerical model, which couples the multiphase flow simulator (OpenFOAM) and reactive transport code (CrunchFlow) through an open source API - Alquimia. Using this model, we investigate how fluid-solid interactions, in particular mineral dissolutions, is affected by multiphase flow dynamics and their impacts on fluid distribution and the macroscopic hydraulic parameters (e.g., relative permeability), and thus subsequent reactions. Here, we focus on the impacts of pore geometry in a single mineral two phase system.