InterPore2026

Reactive transport models in multiscale, multiphysics systems

21 May 2026, 10:05

1h 30m

Poster Presentation (MS07) Mathematical and numerical methods for multi-scale multi-physics, nonlinear coupled processes Poster

Speaker

Sergi Molins (Lawrence Berkeley National Laboratory)

Description

This presentation aims at drawing a comparison between reactive transport models in two systems characterized by processes that act at different times scales. This analogy is used to illustrate and discuss approaches to tackle multiphysics-multiscale problems. Watershed models integrate overland and subsurface flow. The hydrogeochemical response of watersheds and watershed subsystems such as hillslopes, e.g. in the form of C-Q relationship, is as much a function of the mixing of overland and subsurface waters as of the reactive transport processes taking place in each compartment. Fractured media include fast flow paths, the fractures, and slow flow paths, the surrounding matrix. Mass transport limitations between both in the fracture and matrix impact reaction rates and ultimately medium evolution. Overall, reactive transport models in multiscale-multiphysics systems are able to assist in unraveling and quantifying the contribution of the different processes. Ultimately, the time scales associated with each process inform and constrain the mathematical and numerical approaches that can be used in each case.