Abstract
Acoustically-triggered droplet vaporization (ADV) in a tube is numerically studied by extending a level-set method to determine the bubble-droplet interface as well as the droplet-ambient liquid interface and to include droplet evaporation and bubble compressibility effects. The Rayleigh-Plesset equation for ADV in a tube is improved by correctly evaluating the transition from spherical to tube flows. The computations of ADV show that the liquid pressure variation along the tube caused by droplet vaporization and bubble condensation is an important factor determining bubble survival and growth. The influence of tube radius on bubble growth in ADV is quantified in various acoustic amplitude and frequency conditions. Computations are also performed to investigate bubble-bubble interaction in acoustic vaporization of two droplets.
Published Version
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