On the acoustic vaporization of micrometer-sized droplets

• DOI: 10.1121/1.1755236
• Publication Date: 2004-07-02T14:04:14Z
• Authors: Oliver D. Kripfgans; Mario L. Fabiilli; Paul L. Carson; J. Brian Fowlkes
• Keywords: Vaporization; Micrometer

This paper examines the vaporization of individual dodecafluoropentane droplets by application single ultrasonic tone bursts. High speed video microscopy was used to monitor in a flow tube, while focused, element transducer operating at 3, 4, or 10 MHz aimed intersection acoustical and optical beams. A highly dilute droplet emulsion injected, were positioned two foci. Phase transitions produced rarefactional pressures as low 4 MPa 3 using single, 3.25 μs During acoustic irradiation, showed dipole-type oscillations along axis (average amplitude 1.3 μm, independent diameter which ranged from 5 27 μm). The onset monitored either spot-like, within droplet, homogeneous, throughout droplet’s imaged cross section. Spot-like centers nucleation observed solely lying parallel direction oscillation centered on droplet. Smaller required more intensity for than larger droplets, is consistent with other experiments emulsions.