THEORY OF FLOW THROUGH SHORT TUBES WITH SMOOTH AND CORRUGATED SURFACES AND WITH SQUARE EDGED ENTRANCES
AN INVESTIGATION IS DISCUSSED WHICH ESTABLISHED THE FORMULAS OF DISCHARGE FOR CULVERTS OF CONCRETE AND CORRUGATED METAL PIPES WITH SQUARE-EDGED ENTRANCES. THE FLOW IN THE SHORT TUBE IS DIVIDED INTO THREE SEGMENTS: THE ENTRANCE SEGMENT WHERE LOSS OCCURS IN THE SURFACE OF DISCONTINUITY OF THE GRADUALLY VANISHING VENA CONTRACTA AND IS INDEPENDENT OF THE SIZE OF THE TUBE; THE BOUNDARY LAYER SEGMENT IN WHICH THE TURBULENT BOUNDARY LAYER DEVELOPS; AND THE TURBULENT LAYER. THE EFFECTIVE COEFFICIENT OF RESISTANCE IS FOUND BY EXPERIMENTAL METHODS. THE MOMENTUM LAW, TOGETHER WITH THE SUPPOSITION OF A NON-DISSIPATIVE CENTRAL CORE AND THE CONDITION OF CONTINUITY, ENABLES THE DETERMINATION OF THE VARIATION OF BOUNDARY LAYER THICKNESS AND WALL SHEAR WITH DISTANCE FOR A GIVEN RELATIVE ROUGHNESS. THE FORMULAS FORMED WERE COMPARED TO THE EXPERIMENTAL RESULTS WITH SATISFACTORY AGREEMENT.
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Supplemental Notes:
- Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Keulegan, Garbis H
- Publication Date: 1948-12
Media Info
- Media Type: Digital/other
- Features: Figures;
- Pagination: 8p
- Monograph Title: Surface drainage of highways
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Serial:
- Highway Research Board Research Reports
- Issue Number: 6B
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Boundary layer; Concrete pipe; Corrugated metal culverts; Culverts; Flow; Fluid mechanics; Theory; Turbulence
- Candidate Terms: Turbulent flow
- Old TRIS Terms: Discharge
- Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology;
Filing Info
- Accession Number: 00204413
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jun 5 1972 12:00AM