TURBULENT FLOW OF POWER-LAW FLUIDS

Velocity profiles for the steady incompressible turbulent flow of power-law fluids through circular conduits were calculated by numerical quadrature considering both the viscous stresses and the Reynolds' stresses operative over the entire cross section of the flow. A non-Newtonian stress coeffiecient, K sub Sn, was introduced along with mixing length, l, so that the Reynolds' stresses could be put in a form similar to that of the viscous stresses. The form of the Reynolds' stresses thus obtained reduced to the Newtonian form when the flow behavior index, n, equaled unity. Both l and K sub Sn were assumed dependent upon the Reynolds number. Similarly, friction factors for the turbulent flow of power-law fluids were calculated by numerical quadrature. The calculated friction factors were difference between calculated and measured friction factors Reynolds numbers from 2,670 to 108,800. The mean absolute difference between colculated and measured friction factors for this sample was 3 percent with a standard deviation of 1.9 percent.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Mohammed, AIY
  • Gunaji, N N
  • SMITH, P R
• Publication Date: 1975-7

Media Info

• Features: References;
• Pagination: p. 885-900
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 101
  • Issue Number: 7
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Drag; Flow; Pipe flow; Reynolds stress; Turbulence; Velocity
• Candidate Terms: Turbulent flow
• Old TRIS Terms: Drag reduction; Reynolds stresses; Velocity profiles
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00127019
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Nov 5 1975 12:00AM