Accession Number : AD0749103

Title :   The Influence of Drag Reducing Polymer Additives on Surface Pressure Fluctuations on Rough Surfaces.

Descriptive Note : Project rept. 1 Nov 67-30 Apr 70,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS ST ANTHONY FALLS HYDRAULIC LAB

Personal Author(s) : Killen,John M. ; Almo,John A.

Report Date : SEP 1971

Pagination or Media Count : 52

Abstract : 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, caused either by the addition of drag reducing polymer or by changes in surface roughness, or both, were found to correlate with changes in surface shear. (Author)

Descriptors :   (*SKIN FRICTION, REDUCTION), (*FLUID MECHANICS, ADDITIVES), PRESSURE, DRAG, SURFACE ROUGHNESS, POLYMERS, ANALYSIS OF VARIANCE, HYDRODYNAMICS, SHEAR STRESSES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE