DILUTION IN A TURBULENT BOUNDARY LAYER WITH POLYMERIC FRICTION REDUCTION

The dilution by turbulent mixing of a polymer solution after injection into a turbulent boundary layer with polymeric friction reduction is considered. Two-dimensionality and constant-pressure flow over a flat plate are assumed. The intermittency of turbulence and scalar concentration, as well as the effects of friction-reduction on the mean velocity profile, are treated. The 'negative roughness' analogy of polymeric friction reduction is invoked to justify the assumption that all significant properties of the outer-layer region satisfy the newtonian-fluid outer-layer similarity laws, including those for velocity-defect, turbulence intermittency, and mean concentration in the final zone of mixing. (Author)

• Corporate Authors:

  Naval Undersea Research and Development Center

  San Diego, CA  United States 
• Authors:
  • Fabula, A G
  • Burns, T J
• Publication Date: 1970-4

Media Info

• Pagination: 32 p.

Subject/Index Terms

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

Filing Info

• Accession Number: 00033634
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NUC-TP-171
• Files: TRIS
• Created Date: Aug 25 1972 12:00AM