Cm. Elliott et H. Garcke, DIFFUSIONAL PHASE-TRANSITIONS IN MULTICOMPONENT SYSTEMS WITH A CONCENTRATION-DEPENDENT MOBILITY MATRIX, Physica. D, 109(3-4), 1997, pp. 242-256
A model for phase separation in multicomponent systems is studied. In
particular the possibility of a concentration dependence of the mobili
ty matrix is taken into account. This leads to a system of fourth-orde
r degenerate parabolic partial differential equations. We derive these
equations from balance laws, show some properties of the model and pr
ove a global existence result for the degenerate system.