Data di Pubblicazione:
2012
Citazione:
Global existence of weak solutions to a nonlocal Cahn-Hilliard-Navier-Stokes system / P. Colli, S. Frigeri, M. Grasselli. - In: JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS. - ISSN 0022-247X. - 386:1(2012), pp. 428-444.
Abstract:
A well-known diffuse interface model consists of the Navier-Stokes equations nonlinearly coupled with a convective Cahn-Hilliard type equation. This system describes the evolution of an incompressible isothermal mixture of binary fluids and it has been investigated by many authors. Here we consider a variant of this model where the standard Cahn-Hilliard equation is replaced by its nonlocal version. More precisely, the gradient term in the free energy functional is replaced by a spatial convolution operator acting on the order parameter phi, while the potential F may have any polynomial growth. Therefore the coupling with the Navier-Stokes equations is difficult to handle even in two spatial dimensions because of the lack of regularity of phi. We establish the global existence of a weak solution. In the two-dimensional case we also prove that such a solution satisfies the energy identity and a dissipative estimate, provided that F fulfills a suitable coercivity condition.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Navier-Stokes equations; Nonlocal Cahn-Hilliard equations; Incompressible binary fluids; Existence of weak solutions
Elenco autori:
P. Colli, S. Frigeri, M. Grasselli
Link alla scheda completa: