BOUNDARY SHEAR DISTRIBUTION IN OPEN CHANNEL FLOW

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. /ASCE/

• Supplemental Notes:
  • Vol 96, No HY4, PROC PAPER 7241, PP 967-994, 22 FIG, 3 TAB,
• Authors:
  • Ghosh, S N
  • Roy, N
• Publication Date: 1970-4

Media Info

• Serial:
  • Journal of the Hydraulics Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Boundary layer; Channel flow; Flow; Fluid dynamics; Hydraulics; Measuring instruments; Pitot tubes; Shear strength
• Uncontrolled Terms: Fluid flow; Open channel flow
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204283
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 27 1970 12:00AM