The Effect of the Movement of a Passive Reflector on the Atomization of a Levitating Drop

This study investigates the instability of distilled water drops under acoustic levitation induced by the movement of a reflector toward the transducer. The experimental setup consisted of a passive concave reflector and a Langevin transducer in a uniaxial-resonance configuration. The experiment con...

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Bibliographic Details
Published in:Journal of physics. Conference series 2024-09, Vol.2822 (1), p.12091
Main Authors: Meneses-Díaz, J., Cancino-Jaque, E., Carrión-Acuña, M., Vargas-Hernández, Y., Gaete-Garretón, L.
Format: Article
Language:English
Subjects:
Acoustic levitation
Acoustic resonance
Atomizing
Distilled water
Droplets
High speed cameras
Movement
Transducers
Water drops
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Summary:This study investigates the instability of distilled water drops under acoustic levitation induced by the movement of a reflector toward the transducer. The experimental setup consisted of a passive concave reflector and a Langevin transducer in a uniaxial-resonance configuration. The experiment consists of achieving a stable levitation of the droplet and then moving the reflector constantly toward the transducer, shortening the distance h between them (reflector-transducer). All experiments were recorded using a high-speed camera to analyze the drop’s behavior. The results revealed three distinct instabilities: radial atomization occurred when the drop volume ( V D ) was ≤ 3.74 μ l, beyond which central atomization was observed. A third instability is observed when a low reflector velocity ( V r < 0.67 mm/s) is used, where the droplet exhibited modes of oscillation with pulsed central atomization.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2822/1/012091