Microexplosion of emulsified fuel drops

摘要

The explosion dynamics of a liquid drop driven by a high-pressure bubble is simulated numerically by solving the full two-dimensional Navier-Stokes equations and exact boundary equations. It is shown that bubble surface roughness generated by Landau instability during the rapid evaporation stage of the internal phase significantly affects the hydrodynamics instability of the subsequent stage. This study suggests that Rayleigh-Taylor instability controls the hydrodynamics of the subsequent stage and affects the microexplosion disruptive phenomenon and the drop breakup time. The numerical investigation demonstrates the effects of surface tension, viscosity, pressure and size of the internal phase, and characteristics of interfacial disturbance on the internal phase growth, the bubble surface phenomena and the drop breakup time.