• bi-component
• droplet
• evaporation
• immersed boundary
• phase change

Droplet evaporation is a basic phenomenon that occurs in nature and is found in many applications in industrial and research fields. In particular, chemical engineering often deals with droplet evaporation problems, usually in cases like spray drying, evaporative cooling, wet scrubbers and water curtains and so on. In all these operations, heat and mass transfer occur between a continuous phase and a dispersed phase made of droplets. Hence, the global scenario, seen under a physics point of view, is a multiphase flow with strong interaction of mass, momentum and heat transport. As can be conceived, the mathematical model of this system is too complex to provide an analytical solution. So, in order to understand the mechanisms that lye behind and hence to provide design tools, Computational Fluid Dynamics comes into play. In the present work chemical species are implemented in a numerical code based on the Immersed Boundary Method (IBM), developed for the interface resolved simulation of mono-component droplets evaporation. The purpose is to upgrade the code to simulate bi-component droplet evaporation. An experimental case is taken as reference for validating the updated method, by comparing predictions to experimental data, in order to show that the chemical species are successfully implemented in the code.