TURBULENCE INTENSITY AND TIME-MEAN VELOCITY DISTRIBUTIONS IN LOW REYNOLDS NUMBER TURBULENT PIPE FLOWS

Measurements of the cross-sectional distributions of axial turbulence intensity and time-mean velocity in hydrodynamically developed pipe flows were made by means of a hot-film anemometer. The investigation was concerned with the low Reynolds number turbulent regime, and experiments were performed for five Reynolds numbers between 3200 and 24000. Air was the working fluid. The measurements, taken together with those of Laufer for high Reynolds number pipe flows up to 500,000, established that in a studied near-wall region, the ratio of turbulence intensity to friction velocity was independent of Reynolds number.

• Supplemental Notes:
  • Summary in German, French and Russian. Revision of report dated 14 June 71. Also available in International Journal of Heat and Mass Transfer, V15, pp 1067-1074, 1972.
• Corporate Authors:

  University of Minnesota, Minneapolis

  Heat Transfer Laboratory
  Minneapolis, MN  United States 
• Authors:
  • Pennell, W T
  • Sparrow, E M
  • Eckert, ERG
• Publication Date: 1971-10-4

Media Info

• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Anemometry; Flow; Probes (Measuring devices); Reynolds number; Turbulence; Velocity
• Candidate Terms: Turbulent flow
• Old TRIS Terms: Hot wire anemometry; Turbulence probes; Velocity profiles
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00043941
• Record Type: Publication
• Source Agency: National Technical Information Service
• Contract Numbers: N00014-68A-0141-0001
• Files: TRIS
• Created Date: May 4 1973 12:00AM