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Convection in the vertical midplane of a horizontal cylinder Comparison of two-dimensional approximations with three-dimensional resultsExperimental results and numerical data on the flow characteristics of core-driven and boundary-layer-driven regimes (CDRs) and (BLDRs) are compared to two-dimensional solutions for heated convective flow in the vertical midplane of a horizontal cylinder. The data were obtained from laser Doppler velocimetry (LDA) measurements and from three-dimensional numerical solutions. It is shown that the approximate solutions gave the correct Rayleigh-number-dependences and distributions for the velocities in the CDR and BLDR regimes. However, the transition between the CDR and the BLDR, as well as the magnitude of the distribution of velocity components, were found to be dependent on the type of two-dimensional approximation selected. In the case of CDR, core velocities were overestimated by as much as 30 percent by the two-dimensional approximations; and in the case of BLDR, the core velocities were overestimated by 40-50 percent as compared to the measured velocities. A schematic illustration of the flow patterns in the cylinder is provided.
Document ID
19860044289
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bontoux, P.
(Aix-Marseilles Univ. France)
Roux, B.
(Aix-Marseille II, Universite Marseille, France)
Schiroky, G. H.
(Aix-Marseilles Univ. France)
Markham, B. L.
(Aix-Marseilles Univ. France)
Rosenberger, F.
(Utah, University Salt Lake City, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1986
Publication Information
Publication: International Journal of Heat and Mass Transfer
Volume: 29
ISSN: 0017-9310
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
86A29027
Funding Number(s)
CONTRACT_GRANT: NSF DMR-79-13183
CONTRACT_GRANT: NSG-1534
Distribution Limits
Public
Copyright
Other

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