A thermodynamically consistent diffuse interface model for the wetting phenomenon of miscible and immiscible ternary fluids

The wetting effect has attracted great scientific interest because of its natural significance as well technical applications. Previous models mostly focus on one-component fluids or binary immiscible liquid mixtures. Modelling the phenomenon for multicomponent and multiphase is a knotty issue. In this work, we present thermodynamically consistent diffuse interface model to describe ternary fluids, an extension Cahn's theory fluids. particular, consider both miscible For validate equilibrium contact angle thermodynamic pressure with Young's law Young–Laplace equation, respectively. Distinct flow patterns dynamic are presented when surface tension viscous force dominate effect. manipulate wettability two droplets deposited solid substrate according three scenarios: (I) hydrophilic; (II) hydrophilic droplet in hydrophobic one; (III) hydrophobic. angles at each triple junction from simulations compared Neumann's triangle rule. Simulations validation our work performed dimensions. addition, evaporation process obtain same power that previous experiments. Our allows one relate interfacial energies composition, enabling modelling coffee-ring further perspective.