Electric Field Effects on an Injected Air Bubble at Detachment in a Low Gravity EnvironmentThe 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 and uniform electric field. Bubble formation and detachment were visualized and recorded in 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
20110001085
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Iacona, Estelle (Johns Hopkins Univ. Baltimore, MD, United States)
Herman, Cila (Johns Hopkins Univ. Baltimore, MD, United States)
Chang, Shinan (Johns Hopkins Univ. Baltimore, MD, United States)