  Evaporation of multicomponent droplets is important in a wide range of
applications, albeit complex, and requires a careful investigation. We
experimentally and numerically investigate the evaporation characteristics of
spherical, ethanol-water droplets with different initial concentration ratios
in the acoustic levitation field. Imaging techniques and infrared thermometry
are used for acquiring volume and surface temperature variations of droplets,
reflecting their mass and heat transfer characteristics. Numerical simulations
are conducted using modified parameters based on a theoretical model to
consider the effect of the acoustic field. The calculation results show good
agreement with the experimental data. The concentration and temperature
distribution within the droplet is further investigated based on the numerical
results.
