DRAG REDUCTION IN LARGE TUBES AND THE BEHAVIOR OF ANNULAR FILMS OF DRAG REDUCING FLUIDS

A theoretical analysis based on published experimental and mathematical data shows that little or no drag reduction can be obtained with economically feasible concentrations of the currently available polymeric drag-reducing additives, and that special additives with relaxation times nearly one order of magnitude greater than the currently available materials must be developed for use in large-diameter, long-distance pipelines. Preliminary calculations indicate that significant drag-reduction with a lower polymer consumption can be obtained by adding the polymer to the boundary layer of the flow. The laminar annular dilute polymeric film stabilizes the core and permits the core fluid or a capsule to "slide" through the pipeline at reduced pressure drop.

• Corporate Authors:

  Canadian Society for Chemical Engineers

  151 Slater Street
  Ottawa 4, ONo,   Canada 
• Authors:
  • Seyer, F A
  • Metzner, A B
• Publication Date: 1969-12

Media Info

• Features: References;
• Pagination: p. 525-529
• Serial:
  • Canadian Journal of Chemical Engineering
  • Volume: 47
  • Issue Number: 6
  • Publisher: Canadian Society for Chemical Engineers

Subject/Index Terms

• TRT Terms: Additives; Drag; Pipe flow; Polymers
• Old TRIS Terms: Drag reduction; Pipeline flow theory; Polymer additives
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00056080
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM