Abstract
porousMedia4Foam is a package for solving flow and transport in porous media using OpenFOAM® - a popular open-source numerical toolbox. We introduce and highlight the features of a new generation open-source hydro-geochemical module implemented within porousMedia4Foam, which relies on micro-continuum concept and which makes it possible to investigate hydro-geochemical processes occurring at multiple scales i.e. at the pore-scale, reservoir-scale and at the hybrid-scale. Geochemistry is handled by a third party package (e.g. PHREEQC) that is coupled to the flow and transport solver of OpenFOAM®. We conducted benchmarks across different scales to validate the accuracy of our simulator. We further looked at the evolution of mineral dissolution/precipitation in a fractured porous system. Application fields of this new package include the investigation of hydro-bio-geochemical processes in the critical zone, the modelling of contaminant transport in aquifers, as well as and the assessment of confinement performance for geological barriers.
Highlights
Over the last decades, reactive transport modelling (RTM) has become an essential tool for the study of subsurface processes involving flow, transport and geochemical reactions (Steefel et al, 2015a)
It is part of porousMe dia4Foam, an open-source package developed by the authors to solve flow and transport in porous media within the popular simulation platform OpenFOAM®
The multi-scale solver for simulating hydro-geochemical problems is part of porousMedia4Foam, a generic platform for solving flow and transport in porous media at various scales of interest. porousMedia4Foam is an open-source platform developed by the authors using the C++ library OpenFOAM
Summary
Reactive transport modelling (RTM) has become an essential tool for the study of subsurface processes involving flow, transport and geochemical reactions (Steefel et al, 2015a). Micro-continuum models use a single set of partial differential equations throughout the computational domain regardless of the content of a grid block (Steefel et al, 2015b; Soulaine and Tchelepi, 2016) The latter approach is well-suited to capture the dynamic displace ment of the interface between the porous and solid-free regions without involving complex re-meshing strategies. The resulting advanced RTM allows the treatment of complex reactions network as a function of flow conditions, water composition and minerals distribution within the rock including the complex porosity feedback between flow and chemistry It is part of porousMe dia4Foam, an open-source package developed by the authors to solve flow and transport in porous media within the popular simulation platform OpenFOAM®.
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