Double diffusivity model under stochastic forcing.

  title={Double diffusivity model under stochastic forcing.},
  author={Amit K. Chattopadhyay and Elias C. Aifantis},
  journal={Physical review. E},
  volume={95 5-1},
The "double diffusivity" model was proposed in the late 1970s, and reworked in the early 1980s, as a continuum counterpart to existing discrete models of diffusion corresponding to high diffusivity paths, such as grain boundaries and dislocation lines. It was later rejuvenated in the 1990s to interpret experimental results on diffusion in polycrystalline and nanocrystalline specimens where grain boundaries and triple grain boundary junctions act as high diffusivity paths. Technically, the model… 

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