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.
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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
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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