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Pressure drop in fully developed, duct flow of dispersed liquid-vapor mixture at zero gravityThe dynamics of steady, fully developed dispersed liquid-vapor flow in a straight duct at 0-g is simulated by flowing water containing n-butyl benzoate droplets. Water and benzoate are immiscible and have identical density at room temperature. The theoretical basis of the simulation is given. Experiments showed that, for a fixed combined flow rate of water and benzoate, the frictional pressure drop is unaffected by large changes in the volume fraction of benzoate drops and their size distribution. Measured power spectra of the static wall pressure fluctuations induced by the turbulent water-benzoate flow also revealed that their dynamics is essentially unaltered by the presence of the droplets. These experimental findings, together with the theoretical analysis, led to the conclusion that the pressure drop in fully developed, dispersed liquid-vapor flow in straight ducts of constant cross section at 0-g is identical to that due to liquid flowing alone at the same total volumetric flow rate of the liquid-vapor mixture and, therefore, can be readily determined.
Document ID
19910032024
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sridhar, K. R.
(Illinois Univ. Urbana, IL, United States)
Chao, B. T.
(Illinois Univ. Urbana, IL, United States)
Soo, S. L.
(Illinois, University Urbana, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1990
Publication Information
Publication: Acta Astronautica
Volume: 21
ISSN: 0094-5765
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
91A16647
Funding Number(s)
CONTRACT_GRANT: NAS10-11153
Distribution Limits
Public
Copyright
Other

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