REYNOLDS-NUMBER EFFECTS ON THE STRUCTURE OF A TURBULENT CHANNEL FLOW

A high resolution, two component laser-Doppler anemometer has been used for turbulence measurements at a high data rate in a channel flow of water. Measurements of the velocity components in the stream direction and in a direction normal to the wall are reported over the Reynolds number range of 3000/40,000. The combination of high spatial resolution and high data rates enabled accurate reconstruction of time dependent velocity traces. Long-time statistical averages of these signals clearly show that profiles of the dimensionless turbulence quantities such as turbulence intensities and Reynolds stress are strongly Reynolds-number dependent over a large part of the channel flow.

• Supplemental Notes:
  • J. Fluid Mech., 204 (1989), p.57 (Jun.) [39 pp., 37 ref., 1 tab., 28 fig.]
• Authors:
  • Wei, Tao
  • Willmarth, W W
• Publication Date: 1989

Language

• English

Subject/Index Terms

• TRT Terms: Anemometers; Reynolds number
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00696218
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM