Measurement of the Propagation of Long-Wavelength Disturbances Through Turbulent Flow in Tubes

[+] Author and Article Information
D. L. Margolis

Department of Mechanical Engineering, University of California, Davis, Calif.

F. T. Brown

Lehigh University, Bethlehem, Pa.

J. Fluids Eng 98(1), 70-78 (Mar 01, 1976) (9 pages) doi:10.1115/1.3448215 History: Received February 10, 1975; Online October 12, 2010


Phase velocities and attenuation factors for the propagation of small amplitude long wavelength sinusoidal disturbances, measured in a tube with turbulent liquid flow, are reported. Three frequency bands are delineated. A quasi-steady-flow model, based primarily on friction-factor data, is corroborated at low frequencies. An eddy-viscosity model, in which the energy of turbulence fails to respond in quasi-steady fashion to the sinusoidal disturbances, is corroborated at higher frequencies. In a predicted transition band unexpected and dramatic peaks in attenuation and phase velocity were found. A discussion suggests that the phenomenon may be related to deterministic aspects of turbulence production.

Copyright © 1976 by ASME
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