#diffusional

skelland diffusional mass transfer

\mathbf{v}_j) \] where: \( \mu_i \): Chemical potential of species \( i \). \( D_{ij} \): Maxwell-Stefan diffusivity between species \( i \) and \( j \). \( \mathbf{v}_i, \mathbf{v}_j \): Velocities of species \( i \) and \( j \). The model thus