Research Article
Apr 1973
Turbulent Flows Past Boundaries with Small Streamwise Fins
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 99, Issue 4
Abstract
An experimental investigation was conducted to determine the effect of small streamwise fins on the average boundary shear stress of turbulent flows in conduits. The experiments were performed in a rectangular cross-section wind tunnel equipped with a dynamometer-supported shear plate which permitted direct determination of boundary shear stress. Tests were made for a smooth boundary and three different finned surfaces. It was found that over the range of velocities investigated (60 to 100 fps [18 to 31 m/s]) approximately, corresponding to Reynolds numbers of 2.5 x 10FRUS5TUTF to 4.1 x 10FRUS5TUTF, the fins increase the average boundary shear stress on the projected area. The average shear stress on the actual boundary surface may be decreased, but the reduction is more than offset by the increased surface area.
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Published In
Journal of the Hydraulics Division
Volume 99 • Issue 4 • April 1973
Pages: 605 - 616
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Apr 1973
Published online: Feb 3, 2021
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Authors
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John F. Kennedy, M.ASCE
Dir., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa; presently a Fulbright Fellow at Inst. für Hydromechanik, Univ. Karlsruhe, Karlsruhe, West Germany
Sheng-Tien Hsu, AM.ASCE
Research Engr., Tennessee Valley Auth., Engrg. Lab., Norris, Tenn
Jung-Tai Lin
Research Sci., Flow Research, Inc., Seattle, Wash
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.