Accession Number:
AD0730052
Title:
Drag Reduction and Degradation of Dilute Polymer Solutions in Turbulent Pipe Flows.
Descriptive Note:
Research and development rept.,
Corporate Author:
NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
Personal Author(s):
Report Date:
1971-08-01
Pagination or Media Count:
41.0
Abstract:
Drag reduction caused by dilute polyethylene oxide POLYOX WSR-301 and anionic charged polyacrylimide MAGNIFLOC 835A polymer solutions was studied experimentally in 1.918- and 0.455-cm ID smooth pipes. The POLYOX solutions tested are superior in drag reduction but inferior in shear-degradation resistance compared to the MAGNIFLOC solutions at corresponding concentrations. A three-layer mean velocity profile model appears to be more consistent with current and other data than a traditional two-layer model. The onset of measured drag reduction depends upon solution concentration and is seriously affected by shear degradation. Author
Descriptors:
Subject Categories:
- Fluid Mechanics