An analysis was made of a model for fast spinodal decomposition controlled by diffusion. Using the concept of fast phase separation, an interpretation of a purely non-equilibrium contribution to the entropy of a spinodally decomposing system was given in terms of multi-component fluids and of magnetic dipole systems with non-vanishing inertia. Conditions were formulated for violation of the standard so-called hydrodynamic approximation in the description of fast spinodal decomposition.

Kinetic Contribution to the Fast Spinodal Decomposition Controlled by Diffusion. P.Galenko, D.Jou: Physica A, 2009, 388[15-16], 3113-23