Résumé
Simulating hydrodynamic reactive transport processes in heterogeneous systems is required in various research fields and applications including environmental remediation, geological storage, and energy production. Developing reliable numerical tools for these environmental issues requires to consider both the structural heterogeneities encountered in the natural environment, and the complexity of the (bio)geochemical reactions associated with each application. The former is very often modeled at the expense of the latter, in particular when studying large-scale heterogeneous systems such as fractured rocks for which most of the modeling effort focuses on the multi-scale structural heterogeneities. These features are responsible for anomalous transport behavior that is well reproduced by particle-based (PB) methods with optimized computational cost. After introducing PB methods that are usually used for modeling reactive transport in fractured rocks, I will present a new random walk approach that is designed for complex (bio)geochemical reactions and upscaling purpose. [Copyright Author(s) 2023. CC Attribution 4.0 License: https://creativecommons.org/licenses/by/4.0/legalcode]