Multiscale Finite Volume Model for Reactive Transport in Porous and Fractured Media

Tuesday, 16 December 2014
David A Barajas-Solano and Alexandre M Tartakovsky, Pacific Northwest National Laboratory, Computational Mathematics, Richland, WA, United States
Several recent studies demonstrated that under certain conditions, Darcy-scale reactive transport equations are not able to provide sufficiently accurate predictions of multiphase flow and reactive transport. We will present a hybrid a hybrid pore/Darcy scale model based on the Multiscale Finite Volume (MsFV) method, which couples a Darcy-scale model with a MsFV characterization of transport in a region of the computational domain where the Darcy-scale is deficient or inaccurate. The considered examples include transport and mineral precipitation in fractures and porous media. The proposed model results in a significant reduction of computational effort with respect to pore-scale simulations, and increased accuracy with respect to Darcy-scale models. The range of applicability and limitations of the proposed multiscale method will be also discussed.