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Turbulent flow in a channel with transverse rib heat transfer augmentationTurbulent flow in a 2D channel with repeated rectangular rib roughness was numerically simulated using a low Reynolds number form of the k-epsilon turbulence model. Friction factors and average Stanton numbers were calculated for various pitch to rib height ratios and bulk Reynolds numbers. Comparisons with experiment were generally adequate, with the predictions of friction superior to those for heat transfer. The effect of variable properties for channel flow was investigated, and the results showed a greater effect for friction than for heat transfer. Comparison with experiment yielded no clear conclusions. The turbulence model was also validated for a related problem, that of flow downstream of an abrupt pipe expansion.
Document ID
19930050677
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chang, B. H.
(NASA Ames Research Center Moffett Field, CA, United States)
Mills, A. F.
(California Univ. Los Angeles, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: International Journal of Heat and Mass Transfer
Volume: 36
Issue: 6
ISSN: 0017-9310
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A34674
Distribution Limits
Public
Copyright
Other

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