On diffusion processes in a two-phase random nonhomogeneous stratified semispace

The approach has been proposed for description of admixture diffusion in a body with a random nonhomogeneous two-phase laminar structure. Jump discontinuities of diffusion coefficient have been taken into account at interphases as well as equally probable distribution of random layers. Admixture concentration averaged over the ensemble of layer configurations, has been obtained under consideration of medium nonhomogeneties as internal sources.