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Visualization Studies of an Acoustically Excited Liquid Sheet
Author(s) -
SIVADAS VAYALAKKARA,
HEITOR MANUEL V.
Publication year - 2002
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2002.tb04587.x
Subject(s) - laminar flow , mechanics , nozzle , amplitude , liquid flow , flow visualization , airflow , liquid liquid , perturbation (astronomy) , visualization , acoustics , materials science , chemistry , flow (mathematics) , physics , optics , mechanical engineering , thermodynamics , engineering , chromatography , quantum mechanics
A bstract : The interaction between atomizing air and a liquid sheet initiates interfacial instabilities that develop into large amplitude waves, which ultimately promote liquid disintegration. However, to reduce atomizing airflow, the dynamic influence of the surrounding gas is not sufficient to affect the inner core of the liquid. In other words, the characteristic length scales of perturbation promoting break‐up are small in comparison with the initial liquid momentum. Therefore, to enhance the disintegration process, the intact liquid‐core near the nozzle outlet must be influenced by artificial or external excitations. To accomplish this, the present investigation employed a plane laminar liquid‐sheet that was perturbed by acoustic excitations at an optimum frequency through the impinging air‐streams.