Fig. 1: Schematic representation of the different diffusion coefficients in a binary mixture as a function of the mole fraction.
From: Entropy scaling for diffusion coefficients in fluid mixtures
Lines indicate the self-diffusion coefficient of component i Di (blue) and component j Dj (green), the Maxwell-Stefan diffusion coefficient \({{-}\!\!\!\!D}_{ij}\) (dark gray), and the Fickian diffusion coefficient Dij (light gray). The limiting cases \({D}_{i}^{{\rm{pure}}}\), \({D}_{j}^{{\rm{pure}}}\) (both pure cases) and \({D}_{i}^{\infty }\), \({D}_{j}^{\infty }\) (both pseudo-pure cases) are also depicted.
