STATISTICAL PROPERTIES OF VELOCITY DERIVATIVES IN A TURBULENT FIELD. VELOCITY GRADIENTS IN A TURBULENT FIELD

High-speed digital computing methods are applied to the study of the statistical behavior of turbulent velocity derivatives in a nearly isotropic turbulent field downstream of a grid. Higher-order correlations of turbulent velocity gradients, up to the eighth order, are measured. Using non-Gaussion probability distribution laws, the relations between different odd- and even-order correlations are obtained and compared with the experimental measurements. The conditions of similarity and isotropy are evaluated for the small-scale structure as evidenced by the behavior of the turbulent velocity gradients. The concept of intermittency of the small-scale structure is also discussed.

• Corporate Authors:

  Cambridge University Press

  200 Euston Road
  London NW1,   England 
• Authors:
  • Frenkiel, F N
  • Klebanoff, P S
• Publication Date: 1971-7-13

Media Info

• Pagination: p. 183-208
• Serial:
  • Journal of Fluid Mechanics
  • Volume: 48
  • Issue Number: Pt 1
  • Publisher: Cambridge University Press

Subject/Index Terms

• TRT Terms: Flow; Statistical analysis; Turbulence; Unsteady flow; Velocity
• Candidate Terms: Turbulent flow
• Old TRIS Terms: Velocity fluctuations
• Subject Areas: Data and Information Technology; Design; Marine Transportation;

Filing Info

• Accession Number: 00032223
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Apr 21 1972 12:00AM