EDDY VISCOSITY AND MIXING LENGTH FROM MEASURED BOUNDARY LAYER DEVELOPMENT

To obtain profiles of shear stress and eddy viscosity, the boundary-layer equations in finite-difference form have been applied to published turbulent-boundary-layer developments measured in nominally two-dimensional conditions. In applying this procedure, measured velocity profiles have been represented by members of Thompson's profile family. Except close to separation, these representations are very satisfactory, and derived shear-stress profiles are generally in good agreement with direct measurements. Various eddy-viscosity and mixing-length models are compared with the results of the analysis and are found in general to differ widely among themselves and from the present results. The widely used assumption, 1=ky in the wall region, appears to be invalid.

• Corporate Authors:

  Royal Aeronautical Society

  4 Hamilton Place
  London S1V 0BQ,   England 
• Authors:
  • GALBRAITH, R A
  • Head, M R
• Publication Date: 1975-5

Media Info

• Features: References;
• Pagination: p. 133-154
• Serial:
  • Aeronautical Quarterly
  • Volume: 26
  • Issue Number: Pt2
  • Publisher: Royal Aeronautical Society

Subject/Index Terms

• TRT Terms: Boundary layer; Shear stress; Turbulence; Turbulent boundary layer; Velocity; Walls
• Old TRIS Terms: Velocity profiles; Wall shear stress
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00128390
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jan 14 1976 12:00AM