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.

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 9-16
  • Monograph Title: Surface drainage of highways
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00204413
  • Record Type: Publication
  • Report/Paper Numbers: No. 4B-1948 Supplmnt
  • Files: TRIS, TRB
  • Created Date: Jun 5 1972 12:00AM