Numerical simulation of acoustic droplet vaporization near a wall

초록

Numerical simulations are performed for acoustic-driven vaporization of a volatile droplet near a wall by introducing two level-set functions to track the droplet and bubble surfaces. The level-set method is combined with the ghost-fluid and semi-implicit pressure correction methods to implement the effects of liquid-vapor phase change and bubble compressibility. The computations demonstrate the bubble growth in the whole acoustic vaporization process of a dodecafluoropentane droplet and its interaction with a nearby wall. The effects of acoustic pulsing amplitude and frequency as well as initial droplet location and size on the bubble growth and wall shear stress are quantified.

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