Existence result for a nonlocal viscous Cahn-Hillard equation with a degenerate mobility

Abstract

We study a diffusion model of phase field type, consisting of a system of two partial
differential equations of second order for the particle densities and the viscosity
variable, coupled by a nonlocal drift term. We prove the existence of variational solutions
in standard Hilbert spaces for the evolution system by a careful development
of uniform estimates and applying finally a comparison principle.