A novel methodology for the diffusion coefficient determination in porous media by X-ray high-resolution radiographiesM. Santini, S. Fest-Santini, G. E. Cossali, N. Casatta and C. LupoEur. Phys. J. Plus, 139 8 (2024) 696DOI: https://doi.org/10.1140/epjp/s13360-024-05483-7