Kinetics, Hydrodynamics and Stochastodynamics of Cellular Structure Coarsening

Details Kinetics, Hydrodynamics and Stochastodynamics of Cellular Structure Coarsening Kinetics, Hydrodynamics and Stochastodynamics of Cellular Structure Coarsening

1997-10-14

arxiv.org/abs/cond-mat/9710131v3

Mod. Phys. Lett. B 11 (1997) 949

Physics

Condensed Matter

12 pages, Latex, 3 eps figures. Submitted for publication in Modern Physics Letters B on 11/04/97, accepted on 18/09/97 . Revi

Scientific paper

For the first time the phenomenon of cellular structure coarsening are consistently analysed from the positions of kinetic, hydrodynamic and stochastodynamic theories of nonequilibrium statistical systems. Thereby micro-, meso- and macroscopic levels of approach are distinguished. At the microscopic level the cellular structure is describe by a probability distribution function in a phase space of cell coordinates and of cell sizes. A kinetic equation for the function is written and a development to a hydrodynamic equation of a mesoscopic cell medium is realised. It has the form of a diffusion-reaction equation with a negative "diffusion" coefficient and with a cell interface density playing the role of concentration. Its analysis reveals a new effect of macroscopic patterning in the cell medium: existence of space-correlated stochastic fluctuations of the cell interface density.

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