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Absolute and convective instability of a viscous liquid jet surrounded by a viscous gas in a vertical pipeThe absolute and convective instability of a viscous liquid jet emanating into a viscous gas in a vertical pipe is analyzed in a parameter space spanned by the Reynolds number, the Froude number, the Weber number, the viscosity ratio, the density ratio, and the diameter ratio. The numerical results of the analysis are used to demonstrate that reduction in gravity tends to enhance the Rayleigh mode of convective instability which leads to the breakup of a liquid jet into drops of diameters comparable with the jet diameter. On the contrary, the Taylor mode of convective instability that leads to atomization is retarded at reduced gravity. The Rayleigh mode becomes absolutely unstable when the Reynolds number exceeds a critical value for a given set of the rest of the relevant parameters. The domain of absolute instability is significantly enlarged when the effect of gas viscosity is not neglected.
Document ID
19930046147
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lin, S. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Lian, Z. W.
(Clarkson Univ. Potsdam, NY, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: Physics of Fluids A
Volume: 5
Issue: 3
ISSN: 0899-8213
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A30144
Funding Number(s)
CONTRACT_GRANT: NAG3-1402
CONTRACT_GRANT: NSF MSM-88-17372
CONTRACT_GRANT: DAAL03-89-K-0179
Distribution Limits
Public
Copyright
Other

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