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Bubble Formation and Detachment in Reduced Gravity Under the Influence of Electric FieldsThe objective of the study is to investigate the behavior of individual air bubbles injected through an orifice into an electrically insulating liquid under the influence of a static electric field. Both uniform and nonuniform electric field configurations were considered. Bubble formation and detachment were recorded and visualized in reduced gravity (corresponding to gravity levels on Mars, on the Moon as well as microgravity) using a high-speed video camera. Bubble volume, dimensions and contact angle at detachment were measured. In addition to the experimental studies, a simple model, predicting bubble characteristics at detachment was developed. The model, based on thermodynamic considerations, accounts for the level of gravity as well as the magnitude of the uniform electric field. Measured data and model predictions show good agreement and indicate that the level of gravity and the electric field magnitude significantly affect bubble shape, volume and dimensions.
Document ID
20030005575
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Herman, Cila
(Johns Hopkins Univ. Baltimore, MD United States)
Iacona, Estelle
(Johns Hopkins Univ. Baltimore, MD United States)
Chang, Shinan
(Johns Hopkins Univ. Baltimore, MD United States)
Date Acquired
August 21, 2013
Publication Date
November 1, 2002
Publication Information
Publication: Sixth Microgravity Fluid Physics and Transport Phenomena Conference: Exposition Topical Areas 1-6
Volume: 2
Subject Category
Aerodynamics
Funding Number(s)
CONTRACT_GRANT: NAG3-1815
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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