Effective diffusion equations of fractional order: generalized Fik of law and asymptotic solutions

The problem of multidimensional diffusion in the frame of crest model was considered. As for abnormal subdiffu-sional random moves, it is shown that that diffusional current is explained by generalized Fik Law with diffusion tenzor instead of common coefficient. Asymptotic solutions in two limited cases were found, and their graphs were suggested.