Journal
NONLINEARITY
Volume 29, Issue 11, Pages 3426-3453Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0951-7715/29/11/3426
Keywords
two-phase flow; diffuse interface model; non-Newtonian fluids; Cahn-Hilliard equation; L-infinity-truncation
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We consider weak solutions for a diffuse interface model of two non-Newtonian viscous, incompressible fluids of power-law type in the case of different densities in a bounded, sufficiently smooth domain. This leads to a coupled system of a nonhomogenouos generalized Navier-Stokes system and a Cahn-Hilliard equation. For the Cahn-Hilliard part a smooth free energy density and a constant, positive mobility is assumed. Using the L-infinity-truncation method we prove existence of weak solutions for a power-law exponent p > 2d+2/d+2, d=2, 3.
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