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RESEARCH PAPERS

Flow Measurements in a Human Femoral Artery Model With Reverse Lumen Curvature

[+] Author and Article Information
L. H. Back, E. Y. Kwack

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109

M. R. Back

University of California, Los Angeles, CA 90024

D. W. Crawford

Department of Medicine, Cardiology Division, University of Southern California, Los Angeles, CA 90033

J Biomech Eng 110(4), 300-309 (Nov 01, 1988) (10 pages) doi:10.1115/1.3108446 History: Received April 17, 1987; Revised July 26, 1988; Online June 12, 2009

Abstract

Flow visualization and wall pressure measurements were made in a smooth reverse curvature model that conformed to the gentle “s” shape of a left femoral artery angiogram of a patient in a clinical trial. Observed lesion localization at the inner (lesser) curvatures appeared to be associated with secondary flows in the wall vicinity directed toward the inner curvatures that tended to reverse direction in the flow entering the reverse curvature region. Moderate flow resistance increases of about 20 percent above the Poiseuille flow relation were found at the higher physiological Reynolds numbers Re above about 600–700 and thus Dean numbers for steady flow. For pulsatile flow simulation, flow resistances did not increase up to the largest Re of 470 tested. Apparently, the large variations in velocity during the cardiac cycle disrupted the stronger secondary flow patterns observed at the higher Reynolds numbers for steady flow.

Copyright © 1988 by ASME
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