Dispersion dependence on retardation in a real fracture geometry using lattice-gas cellular automaton

摘要: Fractures have been recently identified in potential host rock for high level nuclear waste disposal, like indurated argilite formations. These fractures appear as rapid pathways radionuclides transport and hydrodynamic properties of the inside these systems must thus be characterized. Miscible non-sorbing sorbing tracers displacements were performed on a 2-D model derived from real fracture geometry observed Tournemire formation with lattice-gas cellular automaton (LGA). LGA was shown to easily handle complex such fracture. The numerical breakthrough curves obtained inverted 1-D CDE MIM models. Two main conclusions drawn: (i) at length scale study, tracer our more accurately interpreted terms rather than classical model; (ii) order correctly migration, dispersion coefficient value found increase retardation factor. A semi-empirical relation based Taylor–Aris theory then used describe this dependency.