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Gas-Liquid Separation Strategies in Microgravity EnvironmentBubble entrainment in liquids represents a serious problem in the microgravity environment. Whenever bubbles are entrained in a liquid,they tend to remain stationary in the liquid bulk in the absence of any external forcing. This is due to the reduction or complete absence of the buoyancy force in the microgravity environment, Thus the buoyancy force can not the be exploited to place the bubbles at the top of the liquid volume as in Ig(sub o) conditions. This situation represents a serious drawback in many space based engineering and scientific applications. We have demonstrated in a series of low gravity experiments conducted during parabolic flight on board aircraft that bubbles can be controlled in such a manner as to increase,the probability of their expulsion from a liquid bulk. In these tests the liquid'bulk was made either to be contained within, or to flow through specially designed containers using capillary force alone. Such containers appear to facilitate bubble removal, from the liquid bulk. Different successful liquid flow configurations will be discussed and the efficacy of the resulting bubble expulsion mechanisms will be demonstrated.
Document ID
20070014065
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Antar, Basil N.
(Tennessee Univ. Space Inst. Tullahoma, TN, United States)
Reiss, Donald A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Lehman, Daniel
(Tennessee Univ. Space Inst. Tullahoma, TN, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Space Processing
Meeting Information
Meeting: 45th AIAA Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 8, 2006
End Date: January 11, 2006
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Other

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