Research Article
Apr 1970
Boundary Shear Distribution in Open Channel Flow
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VIEW THE REPLYAuthors: S. N. Ghosh and N. RoyAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 96, Issue 4
Abstract
Boundary shear distribution in both rough and smooth open channels of rectangular and trapezoidal sections is obtained by direct measurement of shear drag on an isolated length of the test channel utilizing the technique of three point suspension system suggested by Bagnold. Existing shear measurement techniques have been reviewed critically. Comparison of the measured distribution has been made with other indirect estimates, from isovels, and Preston tube measurements, based on Keulegan's resistance laws. The discrepancies between the direct and indirect estimates are explained. Of the two indirect estimates the surface pitot tube technique is found to be more reliable. The influence of secondary flow on the boundary shear distribution could not be accurately defined in the absence of a dependable theory on secondary flow.
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Journal of the Hydraulics Division
Volume 96 • Issue 4 • April 1970
Pages: 967 - 994
Copyright
© 1970 American Society of Civil Engineers.
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Published in print: Apr 1970
Published online: Feb 3, 2021
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S. N. Ghosh
Lect. of Civ. Engrg., Indian Inst. of Technol., Kharagpur, India
N. Roy
Asst. Prof. of Civ. Engrg., Indian Inst. of Technol., Kharagpur, India
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