SETTLING OF SPHERES IN DRAG-REDUCING POLYMER SOLUTIONS

The fall velocities of 0.125-0.5 in. dia spheres falling through water or solutions of drag-reducing additives (measured at 20 or 40 C in 6 ft long, 20.32, 13.36, 6.35, or 3.18 cm dia cylinders with precautions to prevent shear degradation) showed that drag reduction occurs at Re less than 100,000, which is contrary to the results of Sanders (Int. Shipbuilding Progr. 14:140-57 (1967)). Thus the Reynolds number alone is not an adequate criterion for drag reduction, even for well-defined sphere hydrodynamics.

• Corporate Authors:

  American Chemical Society

  1155 16th Street, NW
  Washington, DC  United States  20036
• Authors:
  • Carey, W W
  • Turain, R M
• Publication Date: 1970-2

Media Info

• Pagination: p. 185-186
• Serial:
  • Industrial and Engineering Chemical-Fundamentals
  • Volume: 9
  • Issue Number: 1
  • Publisher: American Chemical Society

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: 00056100
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM