Research Article
Feb 1970
Integrating-Float Measurements in Turbulent Flows
Authors: Henry Liu and Charles D. Morris, AM.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 96, Issue 2
Abstract
The effect of turbulence on discharges measured by the integrating-float method is studied. Based on Taylor's classical theory on diffusion of fluid particles by continuous movements, an equation is derived giving the dispersion of floats in a homogeneous turbulence field. It shows that larger errors are expected in using the float technique when the relative intensity and scale of turbulence are large, and when the float used rises rapidly. In the experimental part of the study, the integrating-float technique was used to measure discharges in a laboratory flume. A grid was sometimes placed in the flume to decrease turbulence scale and intensity. Results obtained are compared with discharges measured by a standard sharp-crested weir. For a total of 16 runs taken in flows with turbulence of various intensities and scales, the average errors based on 18 releases are 1% and 3% respectively for cases with and without grid.
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Published In
Journal of the Hydraulics Division
Volume 96 • Issue 2 • February 1970
Pages: 565 - 572
Copyright
© 1970 American Society of Civil Engineers.
History
Published in print: Feb 1970
Published online: Feb 3, 2021
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Affiliations
Henry Liu
Assoc. Prof., Dept. of Civ. Engr., Univ. of Missouri, Columbia, M. O
Charles D. Morris, AM.ASCE
Lt., U.S. Public Health Service, on military leave from NASA, Cape Kennedy, F. L
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.