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Disengagement of a Pendent Liquid Drop From a Vibrating Ceiling

[+] Author Affiliations
Ho-Young Kim

Korea Institute of Science and Technology, Seoul, Korea

Paper No. IMECE2002-32530, pp. 345-350; 6 pages
doi:10.1115/IMECE2002-32530
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 7
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3638-X | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Small drops adhering to a ceiling under a gravitational field are found in many industrial and natural situations. This work investigates a novel scheme to rapidly remove these pendent drops from a solid surface by vibrating the drop. In the experiments, a water drop pendent from a solid surface is vibrated at a fixed frequency while increasing the vibration amplitude. Upon repeating the experiments using different frequencies, it is revealed that there exist resonant frequencies at which the minimum vibration amplitudes inducing a fall-off of the pendent drops are remarkably less than the detaching amplitudes at neighboring frequencies. These frequencies are supposed to correspond to the resonant frequencies of different drop oscillation modes. They are compared with the resonant frequencies predicted by relatively simple analyses, and the factors causing discrepancy between them are discussed.

Copyright © 2002 by ASME
Topics: Ceilings , Drops

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