Measurement of Turbulence Intensity in the Center of the Canine Ascending Aorta With a Hot-Film Anemometer

[+] Author and Article Information
T. Yamaguchi, S. Kikkawa, M. Sugawara

Department of Surgical Science, The Heart Institute Japan, Tokyo Women’s Medical College, Tokyo, Japan

T. Yoshikawa

Department of Cardiovascular Surgery, The Second Hospital of Tokyo Women’s Medical College, Tokyo, Japan

K. Tanishita

Department of Mechanical Engineering, Keio University, Yokohama, Japan

J Biomech Eng 105(2), 177-187 (May 01, 1983) (11 pages) doi:10.1115/1.3138403 History: Received February 12, 1982; Revised December 26, 1982; Online June 15, 2009


The blood flow velocity near the central axis of the canine ascending aorta was measured with a hot-film anemometer. The cardiac output and the heart rate were controlled at will by means of an extracorporeal circulation and by atrial pacing. The turbulent component of the blood flow velocity was calculated using an ensemble average technique. Ensemble average turbulent intensity was also calculated to show the time course of turbulence in the aorta. The ratio of the mean turbulence intensity to the time mean sectional average velocity in the aorta was constant in most animals regardless of the changes in fluid mechanical parameters. The correlation between the frequency parameter and the relative mean turbulence intensity was weakly positive. The power spectrum of the turbulence was also calculated.

Copyright © 1983 by ASME
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