Dissolution of Solid Particles by the Phase-Field Method

Modelling dissolution of solids, at temperatures below the melting point, is a much discussed topic within non-equilibrium thermodynamics. Employing the phase-field method, this work treats the solid-liquid interface as a finite continuous transition between the two phases. The phases are represented by an order parameter which is continuous across the solid-liquid interface. Coupled transport equations are solved, for the order parameter and solute mol-fraction. The dissolution is driven by the chemical potential gradient. As a model system, pure silver and lead are utilized for the solid and liquid phases, respectively.