Spectral and Temporal Characteristics of Post-Stenotic Turbulent Wall Pressure Fluctuations

[+] Author and Article Information
W. H. Pitts

P.O. Box 15946, Nashville, Tenn.; Department of Mechanical Engineering, Vanderbilt University, Nashville, Tenn. 37215

C. F. Dewey

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass. 02139

J Biomech Eng 101(2), 89-95 (May 01, 1979) (7 pages) doi:10.1115/1.3426239 History: Received October 02, 1978; Online October 21, 2010


The power spectral density of turbulent wall pressure fluctuations was measured in a tube downstream of a model arterial constriction. The flow parameters were varied from steady flow to conditions simulating human arterial pulsatile flow. Within the experimental uncertainty (±10 percent in characteristic turbulent frequency, fo , and ±25 percent in absolute rms pressure fluctuation amplitude), turbulent flow at the peak of systole produces wall pressure fluctuations identical to those of a steady flow at the same Reynolds number.

Copyright © 1979 by ASME
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