Motivated by recent experiments on the electro-hydrodynamic instability of spin-cast
polymer films, we study the undulation instability of a thin viscoelastic polymer film
under in-plane stress and in the presence of either a close by contactor or an electric
field, both inducing a normal stress on the film surface. We find that the in-plane stress
affects both the typical timescale of the instability and the unstable wavelengths. The
film stability...
Propagation of polymerization fronts with liquid monomer and liquid polymer is considered
and the influence of vibrations on critical conditions of convective instability is
studied. The model includes the heat equation, the equation for the concentration and the
Navier-Stokes equations considered under the Boussinesq approximation. Linear stability
analysis of the problem is fulfilled, and the convective instability boundary is found
depending on...
Composition gradients in miscible liquids can create volume forces resulting in various
interfacial phenomena. Experimental observations of these phenomena are related to some difficulties
because they are transient, sufficiently weak and can be hidden by gravity driven flows.
As a consequence, the question about their existence and about adequate mathematical models is
not yet completely elucidated. In this work we present some experimental evidences of interfacial
phenomena in miscible liquids...