Experimental measurements were made to determine the
effect of drag reducing polymer additives on the surface
pressure fluctuations on smooth and rough surfaces in relative
motion with water.
Changes in surface pressure fluctuation intensity were
found to be closely related to changes in surface shear when
shear change was caused by the addition of drag reducing
polymer, by a change in surface roughness, or by both of these.
Killen, John; Almo, John.
The Influence of Drag Reducing Polymer Additives on Surface Pressure Fluctuations on Rough Surfaces.
St. Anthony Falls Hydraulic Laboratory.
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