Uncertainty quantification for mineral precipitation and dissolution in fractured porous media

49/2022

Uncertainty quantification for mineral precipitation and dissolution in fractured porous media

Monday 18th July 2022

Botti, M.; Fumagalli, A.; Scotti, A.

In this work, we present an uncertainty quantification analysis to determine the influence and importance of some physical parameters in a reactive transport model in fractured porous media. An accurate description of flow and transport in the fractures is key to obtain reliable simulations, however, fractures geometry and physical characteristics pose several challenges from both the modeling and implementation side. We adopt a mixed-dimensional approximation, where fractures and their intersections are represented as objects of lower dimension. To simplify the presentation, we consider only two chemical species: one solute, transported by water, and one precipitate attached to the solid skeleton. A global sensitivity analysis to uncertain input data is performed exploiting the Polynomial Chaos expansion along with spectral projection methods on sparse grids.

This report, or a modified version of it, has been also submitted to, or published on
GEM International Journal on Geomathematics