SOME TURBULENCE MEASUREMENTS IN OPEN-CHANNEL FLOW

MEASUREMENTS OF THE CHARACTERISTICS OF TURBULENCE IN HYDRODYNAMICALLY SMOOTH AND HYDRODYNAMICALLY ROUGH OPEN-CHANNEL FLOW USING HOT-FILM ANEMOMETRY TECHNICS SHOWED: (1) THAT THE RELATIVE TURBULENT INTENSITY OF THE VERTICAL VELOCITY COMPONENT WAS ABOUT 60% OF THE LONGITUDINAL, (2) THAT THE SPECTRAL ENERGY DISTRIBUTION WAS NOT SIGNIFICANTLY AFFECTED BY THE TYPE OF FLOW, (3) THAT MOST OF THE TURBULENT ENERGY IS CONTAINED IN FREQUENCIES LESS THAN 5 HERTZ, (4) THE MACROSCALE OF THE TURBULENCE AS DETERMINED FROM THE AUTOCORRELATION FUNCTION WAS ON THE SAME ORDER AS THE DEPTH, AND (5) THE RATIO OF THE MICROSCALE TO DEPTH RANGED FROM 0.1 TO 0.2. THE MEASUREMENTS WERE USED TO VERIFY EXPERIMENTALLY THE LONGITUDINAL DIRECTION MOMENTUM TERMS IN THE NAVIER- STOKES EQUATION AND TO DETERMINE QUALITATIVELY THE MAGNITUDE OF THE PRODUCTION, DIFFUSION, AND DISSIPATION TERMS IN THE ENERGY EQUATION. /ASCE/

• Supplemental Notes:
  • Vol 95, No HY1, PROC PAPER 6349, PP 209-223, 11 FIG, 3 TAB,
• Authors:
  • McQuivey, R S
  • Richardson, E V
• Publication Date: 1969-1

Media Info

• Serial:
  • Journal of the Hydraulics Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Anemometers; Channel flow; Electromagnetic spectrum; Energy; Flow; Hydrodynamics; Mathematical analysis; Measurement; Turbulence
• Candidate Terms: Turbulent flow
• Uncontrolled Terms: Open channel flow
• Old TRIS Terms: Hot wire anemometers
• Subject Areas: Energy; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204205
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 21 1994 12:00AM