Adaptive formulation for two-phase reactive transport in heterogeneous porous media. (September 2021)

• Record Type: Journal Article
• Authors: Deucher, Ricardo H.; Tchelepi, Hamdi A.
• Is Part Of: Advances in water resources. Volume 155(2021)
• Publication Date: 2021-09
• Subjects: Reactive transport -- Adaptive -- Multiscale -- Sequential -- Multiphase flow; Hydrology -- Periodicals; Hydrodynamics -- Periodicals; Hydraulic engineering -- Periodicals; 551.48
• DOI: 10.1016/j.advwatres.2021.103988
• Languages: English
• ISSNs: 0309-1708

Abstract

Highlights: Adaptive scheme for reactive transport in heterogeneous domains is presented. Sequential solution of flow, transport, and reactions. Preserves modularity of transport and reactions. A single general prolongation operator tackles different reactive components. 2D and 3D results with changes in rock properties and operational conditions. Abstract: An adaptive scheme for the sequential formulation of reactive transport involving two fluid phases is presented. Instead of solving the transport problem on the global fine-scale model, we decompose the domain into coarse gridblocks that are aggregates of fine gridblocks, and we define and solve transport problem on each of the coarse blocks. The details of the prolongation operator that allows for accurate reconstruction of the fine-scale solution within a coarse gridblock are described. The prolongation operator is independent of the details of the chemical reactions involving the particular component being transported and does not interfere with the chemical module, providing flexibility of implementation and applicability to a wide range of conditions. Test cases include applications of the adaptive strategy for chains of homogeneous decay reactions, as well heterogeneous reactions that involve changes in porosity and the reactive surface area with variable time step size and changes in operational conditions.