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Ng BT, Hung YM, Tan MK. Acoustically-controlled Leidenfrost droplets. J Colloid Interface Sci. 2015;465:26-32doi: 10.1016/j.jcis.2015.11.047.
Ng, B. T., Hung, Y. M., & Tan, M. K. (2016). Acoustically-controlled Leidenfrost droplets. Journal of colloid and interface science, 46526-32. https://doi.org/10.1016/j.jcis.2015.11.047
Ng, Boon T, et al. "Acoustically-controlled Leidenfrost droplets." Journal of colloid and interface science vol. 465 (2016): 26-32. doi: https://doi.org/10.1016/j.jcis.2015.11.047
Ng BT, Hung YM, Tan MK. Acoustically-controlled Leidenfrost droplets. J Colloid Interface Sci. 2016 Mar 01;465:26-32. doi: 10.1016/j.jcis.2015.11.047. Epub 2015 Nov 21. PMID: 26641561.
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J Colloid Interface Sci. 2016 Mar 01;465:26-32. doi: 10.1016/j.jcis.2015.11.047. Epub 2015 Nov 21.

Acoustically-controlled Leidenfrost droplets.

Journal of colloid and interface science

Boon T Ng, Yew Mun Hung, Ming K Tan

Affiliations

  1. School of Engineering, Monash University Malaysia, 47500 Bandar Sunway, Selangor, Malaysia.
  2. School of Engineering, Monash University Malaysia, 47500 Bandar Sunway, Selangor, Malaysia. Electronic address: [email protected].

PMID: 26641561 DOI: 10.1016/j.jcis.2015.11.047

Abstract

Suppressing the Leidenfrost effect can significantly improve heat transfer from a heated substrate to a droplet above it. In this work, we demonstrate that by generating high frequency acoustic wave in the droplet, at sufficient vibration displacement amplitudes, the Leidenfrost effect can be suppressed due to the acoustic radiation pressure exerted on the liquid-vapor interface; strong capillary waves are observed at the liquid-vapor interface and subsequently leads to contact between the liquid and the heated substrate. Using this technique, with 10(5)Hz vibration frequency and 10(-6)m displacement amplitude of the acoustic transducer, a maximum of 45% reduction of the initial temperature (T0∼200-300°C) of the heated substrate can be achieved with a single droplet of volume 10(-5)l.

Copyright © 2015 Elsevier Inc. All rights reserved.

Keywords: Acoustic streaming; Capillary wave; Heat transfer; Leidenfrost droplets; Thin film; Ultrasound

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