Hydrodynamic impact regimes of the water-in-diesel microemulsion fuel drop onto a horizontal heated wall

The study discusses hydrodynamic impact regimes of the water-in-diesel microemulsion fuel drop onto a heated rigid wall. For the drop thermal breakup and rebound regimes, the maps of drop impact parameters were plotted to define the governing relationships between inertia, viscosity and surface tension forces. In addition, the study provides the critical (threshold) Weber and Reynolds numbers corresponding to the transitions between drop thermal breakup and rebound regimes. The findings, from a practical standpoint, can be utilized to supplement knowledge on producing the air-fuel mixture in combustion chambers.