Phase-feld theory of multi-component incompressible Cahn-Hilliard liquids
Abstract
In this paper a generalization of the Cahn-Hilliard theory of binary liquids is presented for multi-component incompressible liquid mixtures. First, a thermodynamically consistent convection-diffusion type dynamics is derived on the basis of the Lagrange multiplier formalism. Next, a generalization of the binary Cahn-Hilliard free energy functional is presented for arbitrary number of components, offering the utilization of independent pairwise equilibrium interfacial properties. We show that the equilibrium two-component interfaces minimize the functional, and demonstrate, that the energy penalization for multi-component states increases strictly monotonously as a function of the number of components being present. We validate the model via equilibrium contact angle calculations in ternary and quaternary (4-component) systems. Simulations addressing liquid flow assisted spinodal decomposition in these systems are also presented.
Keywords
Cite
@article{arxiv.1512.03258,
title = {Phase-feld theory of multi-component incompressible Cahn-Hilliard liquids},
author = {Gyula I. Toth and Mojdeh Zarifi and Bjorn Kvamme},
journal= {arXiv preprint arXiv:1512.03258},
year = {2016}
}