TURBULENT FLOW IN SMOOTH AND ROUGH PIPES

Fully developed turbulent flow in both smooth and rough-walled pipes is investigated for Reynolds number from 30,000 to 480,000. The values of mean velocity, root-mean-square values of the fluctuating velocity components, and cross-correlation values of the fluctuating velocities are presented for flow in a smooth pipe and two sand roughened pipes. Differences between smooth and rough pipe results, suggests that the accepted reduction of the Reynolds equations for flow in smooth pipes is not valid for flow in rough pipes. Thus, the Reynolds equations are re-examined for flow in rough pipes, and it is shown that these equations can be satisfied by the experimental data if secondary flows and angular variations in the mean velocity are postulated.

• Supplemental Notes:
  • Paper for the meeting November 28-December 2, 1971.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Townes, H W
  • Gow, J L
  • Powe, R E
  • Weber, N
• Publication Date: 1971-11-28

Media Info

• Features: References;
• Pagination: 9 p.

Subject/Index Terms

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

Filing Info

• Accession Number: 00040943
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: ASME Pap 71-WA/FE-7
• Files: TRIS
• Created Date: Feb 23 1973 12:00AM