Published Paper

Inserted: 30 sep 2026
Last Updated: 30 sep 2026

Journal: Calc. Var. Partial Differential Equations
Year: 2024
Doi: 10.1007/s00526-025-03001-w

Abstract:

We show existence and uniqueness of strong solutions to a Navier-StokesCahn-Hilliard type system on a given two-dimensional evolving surface in the case of different densities and a singular (logarithmic) potential. The system describes a diffuse interface model for a two-phase flow of viscous incompressible fluids on an evolving surface. We also establish the validity of the instantaneous strict separation property from the pure phases. To show these results we use our previous achievements on local well-posedness together with suitable novel regularity results for the convective Cahn-Hilliard equation. The latter allows to obtain higher-order energy estimates to extend the local solution globally in time. To this aim the time evolution of energy type quantities has to be calculated and estimated carefully.