Accession Number : AD0727632

Title :   Diffusion of Drag Reducing Polymers in a Turbulent Boundary Layer.

Descriptive Note : Master's thesis,

Corporate Author : IOWA INST OF HYDRAULIC RESEARCH IOWA CITY

Personal Author(s) : Poreh,Michael ; Hsu,Kuang-Shen

Report Date : APR 1971

Pagination or Media Count : 31

Abstract : The diffusion of diluted drag reducing polymers and the effect of the diffusing polymers on the development of the boundary layer are analyzed. The analysis suggests that the diffusion rate is reduced together with the drag. However, in most practical situations the reduction in the diffusion rate is small. Polymers ejected near the wall will diffuse over the entire turbulent boundary layer within a distance of the order of 1000 boundary layer thicknesses. (Author)

Descriptors :   (*SKIN FRICTION, REDUCTION), (*POLYMERS, *DIFFUSION), (*TURBULENT BOUNDARY LAYER, DRAG), THICKNESS, THESES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE