DIFFUSION OF DRAG REDUCING POLYMERS IN A TURBULENT BOUNDARY LAYER

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)

• Corporate Authors:

  University of Iowa, Iowa City

  Iowa Institute of Hydraulic Research, 300 South Riverside Drive
  Iowa City, IA  United States  52242-1585
• Authors:
  • Poreh, M
  • Hsu, K S
• Publication Date: 1971-4

Media Info

• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Additives; Atmospheric diffusion; Boundary layer; Drag; Polymers; Turbulence; Turbulent boundary layer
• Old TRIS Terms: Drag reduction; Polymer additives; Turbulent diffusion
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00024768
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: IIHR-125
• Contract Numbers: Nonr-1161(03)
• Files: TRIS
• Created Date: Jan 14 1972 12:00AM