The diffuse interface models, part of the family of the front capturing methods, provide an
efficient and robust framework for the simulation of multi-species flows. They allow the
integration of additional physical phenomena of increasing complexity while ensuring
discrete conservation of mass, momentum, and energy. The main drawback brought by the
adoption of these models consists of the interface smearing, increasing with the simulation
time, therefore, requiring a counteraction through the introduction of sharpening terms and a …