Analysis of nonlinear mass and energy diffusion

A study of nonlinear plasma mass and energy diffusion reveals that the diffusion coefficients uniquely determine one of two diffusion patterns. After a short initial transient time, either an organized universal pattern, described by a time-space separable solution, is formed or transport is inhibited, allowing only a partial organization of diffusion into a universal pattern. Consequently, in the second case, unlike the first, the asymptotic shape of the solution will depend to some extent on its initial state.