A diffuse interface model for two-phase incompressible flows with non-local interactions and non-constant mobility. (17th April 2015)

• Record Type: Journal Article
• Authors: Frigeri, Sergio; Grasselli, Maurizio; Rocca, Elisabetta
• Is Part Of: Nonlinearity. Volume 28:Number 5(2015:May)
• Page Start: 1257
• Page End: 1293
• Publication Date: 2015-04-17
• Subjects: Navier–Stokes equations -- non-local Cahn–Hilliard equations -- degenerate mobility -- incompressible binary fluids -- weak solutions -- global attractors; 35Q30 -- 37L30 -- 45K05 -- 76D03 -- 76T99; Nonlinear theories -- Periodicals; Mathematical analysis -- Periodicals; Mathematical analysis; Nonlinear theories; Periodicals; 515
• DOI: 10.1088/0951-7715/28/5/1257
• Languages: English
• ISSNs: 0951-7715

Abstract

Abstract: We consider a diffuse interface model for incompressible isothermal mixtures of two immiscible fluids with matched constant densities. This model consists of the Navier–Stokes system coupled with a convective non-local Cahn–Hilliard equation with non-constant mobility. We first prove the existence of a global weak solution in the case of non-degenerate mobilities and regular potentials of polynomial growth. Then we extend the result to degenerate mobilities and singular (e.g. logarithmic) potentials. In the latter case we also establish the existence of a global attractor in dimension two. Using a similar technique, we show that there is a global attractor for the convective non-local Cahn–Hilliard equation with degenerate mobility and singular potential in dimension three.