Speaker
Description
Porous media are characterized by their physical and mineralogical heterogeneity at spatial scales from nanometers to meters. Fluid flow and solute transport may have characteristic scales that span orders of magnitude in complex porous media. As a result, relatively large gradients in geochemical conditions may exist in regions in close proximity. Pore scale models have been successfully used to simulate flow and reactive transport in natural and engineered media but are still challenged by the size of the domain and the complexity of the pore structures they can consider or the ability to capture processes with different characteristic scales. Here we develop a pore scale model to quantify the relationship between porous media heterogeneity and the development of these geochemical gradients which ultimately determine the effective reaction rates in subsurface applications. Advantages of our approach include the ability to construct complex porous geometries, and to perform high resolution simulations on HPC platforms that make use of accelerators. We demonstrate the use of the model in quantifying effective rates of weathering and mineralization reactions in complex porous media.
| Country | United States |
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