Digital Rock Physics: computation of hydrodynamic dispersion
Earth Sciences Institute of Orléans, CNRS-Université d’Orléans-BRGM, 45100 Orléans, France
2 Laboratoire GéHCO, Campus Grandmont, Université de Tours, 37200 Tours, France
* Corresponding author: firstname.lastname@example.org
Accepted: 26 May 2021
Hydrodynamic dispersion is a crucial mechanism for modelling contaminant transport in subsurface engineering and water resources management whose determination remains challenging. We use Digital Rock Physics (DRP) to evaluate the longitudinal dispersion of a sandpack. From a three-dimensional image of a porous sample obtained with X-ray microtomography, we use the method of volume averaging to assess the longitudinal dispersion. Our numerical implementation is open-source and relies on a modern scientific platform that allows for large computational domains and High-Performance Computing. We verify the robustness of our model using cases for which reference solutions exist and we show that the longitudinal dispersion of a sandpack scales as a power law of the Péclet number. The assessment methodology is generic and applies to any kind of rock samples.
© C. Soulaine et al., published by IFP Energies nouvelles, 2021
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