• DOI:10.1063/1.5121728
• Corpus ID: 209926238

Numerical and experimental investigation of the stability of a drop in a single-axis acoustic levitator

@article{Andrade2019NumericalAE,
  title={Numerical and experimental investigation of the stability of a drop in a single-axis acoustic levitator},
  author={Marco Aur{\'e}lio Brizzotti Andrade and Asier Marzo},
  journal={Physics of Fluids},
  year={2019}
}

• M. Andrade, A. Marzo
• Published 4 November 2019
• Physics
• Physics of Fluids

Acoustic levitation can be employed to hold liquid drops in midair, enabling novel applications in X-ray scattering of proteins, amorphous crystallization of solutions, or contactless mixing. Multiple studies have characterized the physical behavior of a levitated drop inside an acoustic field. Here, we present a numerical and experimental study on the acoustic levitation of water drops in a single-axis acoustic levitator consisting of an ultrasonic transducer and an opposing reflector. Instead of modeling an abstract incident acoustic field, our model considers the shape of the drop as well as the real geometry of the levitator. We also use a high-speed camera to observe the disintegration and the undesired oscillations of the drops. Our results show that the insertion of a drop in the levitator provokes a shift in its resonant frequency that depends on the shape of the drop. Second, the levitation behavior depends on whether the levitator operates slightly below or above the resonance. Third, if the lev...