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Direct measurement of shear stress on a water flume floor

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dc.contributor.authorPetryk, Sylvester, author
dc.contributor.authorShen, Hsieh Wen, 1931-, author
dc.contributor.authorColorado State University, publisher
dc.date.accessioned2019-09-17T19:20:13Z
dc.date.available2019-09-17T19:20:13Z
dc.date.issued1969-04
dc.descriptionCER68-69SP-HWS29.
dc.descriptionApril 1969.
dc.descriptionIncludes bibliographical references.
dc.descriptionSponsored by the National Science Foundation.
dc.description.abstractA floating-element-type balance was successfully built to measure small forces, such as shear stress, on the bottom of a laboratory water flume floor. The balance was tested when it was used to measure shear stress values directly on a smooth wall. The values of shear stress were compared to those obtained by the Preston tube technique. Agreement was found to be good. The surface area of the shear plate exposed to the flow was 24.2 square centimeters. Since the magnitude of shear stress varied from 0.0023 to 0.03 grams per square cm, the total measured force on this plate varied from 0.0462 grams to 0.607 grams. The balance was calibrated for a maximum range of 1.000 grams. When the directly measured shear stress readings were compared to the Preston tube values, the maximum difference did not exceed 0.06 grams or 6% of the range of the balance. Low shear stress values of order 0.0023 grams per square centimeter can be measured satisfactorily if the maximum force range of the balance is reduced according to a design procedure outline in Appendix A. Presented in this report are the experimental results, the design details, and other applications of the balance. The advantages of this d e sign over other existing ones are also discussed.
dc.description.sponsorshipUnder grant no. GK 0549.
dc.format.mediumtechnical reports
dc.identifier.urihttps://hdl.handle.net/10217/198092
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991012751599703361
dc.relation.ispartofCivil Engineering Reports
dc.relation.ispartofCER, 68/69-29
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subject.lcshHydrodynamics
dc.subject.lcshShear flow
dc.titleDirect measurement of shear stress on a water flume floor
dc.typeText
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