FRICTION--FREQUENCY DEPENDENCE FOR OSCILLATORY FLOWS IN CIRCULAR PIPE

Measured data of velocity changes in oscillatory flows (0.16Hz-0.36Hz) are presented. The actual wall shear stresses obtained from the measurements are compared to calculated values based on steady flow relations and Zielke's model. A new model for the prediction of the wall shear stress as function of velocity and acceleration changes is introduced. The proposed model may be a suitable basis for the prediction of friction data for one-dimensional flow analysis under nonsteady conditions.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Safwat, H H
  • Van der Polder, J
• Publication Date: 1973-11

Media Info

• Features: References;
• Pagination: p. 1933-45
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 99
  • Issue Number: HY11
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Pipe flow; Shear stress; Skin resistance; Unsteady flow; Walls
• Old TRIS Terms: Wall shear stress
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00053970
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: #10158 Paper
• Files: TRIS
• Created Date: May 7 1974 12:00AM