EXPERIMENTAL AND THEORETICAL STUDIES OF EARLY TURBULENCE

Experimental and theoretical studies of early turbulence in pipe flows of drag-reducing polymer solutions are described in this work. The experiments show that a critical onset wall shear stress, which increases with solvent viscosity, is associated with the phenomenon. The relationship of the onset condition to polymer concentration is a strong function of viscosity over the range of variables considered. A theoretical, hydrodynamic stability analysis of the laminar pipe flow of a convected Maxwell fluid is presented. The results suggest that early turbulence is a hydrodynamic instability phenomenon.

• Supplemental Notes:
  • Presented at the Pac Chem Eng Congr, 1st, Kyoto, Japan, Oct. 10-14, 1972, which was sponsored by the Japanese Society of Chemical Engineers and the American Institute of Chemical Engineers.
• Corporate Authors:

  American Institute of Chemical Engineers

  345 East 47th Street
  New York, NY  United States  10017
• Authors:
  • Hansen, R J
  • Little, R C
  • Forame, P C
• Publication Date: 1972-10

Media Info

• Features: References;
• Pagination: p. 306-310

Subject/Index Terms

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

Filing Info

• Accession Number: 00050502
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Paper 11-5
• Files: TRIS
• Created Date: Jan 24 1974 12:00AM