Drag Reduction and Degradation of Dilute Polymer Solutions in Turbulent Pipe Flows.
Research and development rept.,
NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
Pagination or Media Count:
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
- Fluid Mechanics