Viscous Drag Reduction in Developing Pipe Flow,
Abstract
The characteristics of flow in the entrance region of a rough pipe were studied for water flow and for polymer injection into a boundary layer in a 12-in. diam, 200-ft long steel pipe. The tests without injection provided information on the velocity profile and boundary layer development. A mathematical model was developed for predicting boundary layer thickness, core velocity, and pressure coefficient in the inlet region. Polymer was injected through a perforated wall pipe section located 3.5 pipe diameters from the pipe inlet. Drag reduction, degradation, velocity and concentration profiles were measured. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1973
- Accession Number
- AD0771456
Entities
People
- J. Paul Tullis
- Kikkeri L. V. Ramu
Organizations
- Colorado State University