The thick, turbulent boundary layer on a cylinder: Mean and fluctuating velocities

Richard M. Lueptow*, Patrick Leehey, Thomas Stellinger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


The mean and fluctuating velocities in a turbulent boundary layer on a cylinder have been experimentally characterized for the case where the boundary layer is thick compared to the radius of transverse curvature. The mean velocity measurements suggest a mixed scaling for the "log law of the wall" using the wall coordinate yUτ/ν and the ratio of the local boundary layer thickness to the radius of the cylinder δ/a. A relation for the slope and intercept of the log law of the wall as functions of δ/a based on empirical results and simple analysis is presented. Measurements of the Reynolds stress for δ/a of order 10 show that the Reynolds stress drops off much more quickly with distance from the wall than for a turbulent boundary layer on a flat plate. Both the Reynolds stress data and the turbulent intensity in the mean flow direction data are functions of the inverse radial distance from the center of the cylinder.

Original languageEnglish (US)
Pages (from-to)3495-3505
Number of pages11
JournalPhysics of Fluids
Issue number12
StatePublished - 1985

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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