  The aim of the study is to compare the standard Maxwell-Stefan model of
diffusion with the higher-order one recently derived. This higher-order model
takes into account the influence of the complete pressure tensor. A numerical
scheme is developed for comparing the two models through numerical simulations
of three-component diffusion. It is shown that the higher-order model preserves
qualitative features of the diffusion process, but quantitative differences
were observed in the behavior of the mixture components.
