Alternative Title

Measurements in Turbulent Water Flows by Laser Anemometry


Measurements of the mean and rms values of the longitudinal velocity in a rectangular duct are reported. These results were obtained in a water flow using a laser anemometer. The important design criteria which facilitated the measurements are described and gradient, transit-time, noise and refractive-index corrections are specifically discussed. The results demonstrate the development of a rectangular duct flow and, in particular, reveal that a small lack of symmetry at the duct entrance can readily be identified in the normal- stress results, 37 hydraulic diameters downstream.

The possibility of utilizing water droplets in steam and gas bubbles in water to scatter light and thereby to assist laser-anemometer studies of turbulence is discussed. Experimental evidence obtained by the authors and their colleagues is used to support the conclusions.

Meeting Name

3rd Biennial Symposium on Turbulence in Liquids (1973: Sep., Rolla, MO)


Chemical and Biochemical Engineering


The authors gratefully acknowledge the Central Electricity Generating Board for the financial support which made this paper possible.

Document Type

Article - Conference proceedings

Presentation Type

Invited Lecturer


Laser-Doppler Velocimetry

Document Version

Final Version

File Type





© 1973 University of Missouri--Rolla, All rights reserved.