Suppressed diffusion of drag-reducing polymer in a turbulent boundary layer

Journal Article · Fri Dec 31 23:00:00 EST 1971 · J. Hydronaut.; (United States)

DOI:https://doi.org/10.2514/3.48121· OSTI ID:6331685

Wu, J

The concentration of drag-reducing polymer ejected from a thin wall slot into a developing turbulent boundary layer (external flow) was measured with a laser- phototransistor unit. Experiments included tests of ejecting polymer solutions of various concentrations at various ejection rates. The polymer solution was colored with dye and the additive concentration within the boundary layer was deduced from the dye concentration, which attentuated the laser light received by the phototransistor. The results indicate a suppressed turbulent diffusion of polymer solution. (17 refs.)

• Research Organization: Hydronautics Inc
• OSTI ID: 6331685
• Journal Information: J. Hydronaut.; (United States), Journal Name: J. Hydronaut.; (United States) Vol. 6:1; ISSN JHYDB
• Country of Publication: United States
• Language: English

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BOUNDARY LAYERS
COMMINUTION
DATA
DIFFUSION
DRAG
FLUID FLOW
FRACTURING
INFORMATION
LASERS
LAYERS
OIL WELLS
PHOTOTRANSISTORS
POLYMERS
SEMICONDUCTOR DEVICES
STIMULATION
TESTING
TRANSISTORS
TURBULENCE
WATER TREATMENT
WELL STIMULATION
WELLS