  This study presents a smoothed particle hydrodynamics (SPH) method with
Peng-Robinson equation of state for simulating drop vaporization and drop
impact on a hot surface. The conservation equations of momentum and energy and
Peng-Robinson equation of state are applied to describe both the liquid and gas
phases. The governing equations are solved numerically by the SPH method. The
phase change between the liquid and gas phases are simulated directly without
using any phase change models. The numerical method is validated by comparing
numerical results with analytical solutions for the vaporization of n-heptane
drops at different temperatures. Using the SPH method, the processes of
n-heptane drops impacting on a solid wall with different temperatures are
studied numerically. The results show that the size of the film formed by drop
impact decreases when temperature increases. When the temperature is high
enough, the drop will rebound.
