TURBULENT FLOW NEAR SMOOTH WALL

Experiments have demonstrated the existence of mean streamwise vorticity in turbulent flow near a smooth wall. Mean Streamwise vorticity in uniform turbulent flow has also been shown to depend to a large extent on gradients of the difference in the traverse Reynolds normal stresses. It is suggested therefore that the largest gradient of this difference in the viscous sublayer is significant and that streamwise vortices or small-scale secondary flows created by an instability in this gradient may cause the longitudinal streaks that have been observed. An explantory solution for the streamwise vorticity using estimated characteristics of a perturbed turbulence distribution in the viscous sublayer shows that the postulate is quantitatively feasible. The results of several experimental investigations seem to be consistent with the postulated origin of the streamwise structure.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Gerard, R
• Publication Date: 1974-12

Media Info

• Features: References;
• Pagination: p. 1129-42
• Serial:
  • Journal of Engineering Mechanics
  • Volume: 100
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9399
  • EISSN: 1943-7889
  • Serial URL: http://ascelibrary.org/journal/jenmdt

Subject/Index Terms

• TRT Terms: Boundary layer; Shear stress; Turbulence; Turbulent boundary layer; Vortices; Walls
• Uncontrolled Terms: Secondary flow
• Old TRIS Terms: Wall shear stress
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00084552
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: May 19 1975 12:00AM