DOMENICO SUPPA
Università di Bari
Phase-ordering dynamics of binary mixtures with field-dependent
mobility in shear flow
The effect of a field-dependent mobility on the phase-ordering
dynamics of a binary mixture subject to an uniform shear flow is
investigated.
The problem is addressed in the context of the time-dependent
Ginzburg-Landau equation with an external velocity term, using a
self-consistent approximation to study the evolution of the model.
Assuming a scaling ansatz for the structure factor, we are able to predict
the asymptotic behavior of the observables in the scaling regime. All the
observables show log-time periodic oscillations which we interpret as due
to a cyclical mechanism of stretching and break-up of domains. These
oscillations are dumped as consequence of the vanishing of the mobility
in the bulk phase.