Pulsatile Flow in a Constricted Channel

[+] Author and Article Information
O. R. Tutty

Department of Aeronautics and Astronautics, University of Southampton, Southampton SO9, 5NH, U.K.

J Biomech Eng 114(1), 50-54 (Feb 01, 1992) (5 pages) doi:10.1115/1.2895449 History: Received August 06, 1991; Revised September 30, 1991; Online March 17, 2008


A nonuniform channel is used as a simple model of a constricted arterial vessel. Flow patterns have been calculated for pulsatile flow with both sinusoidal and nonsinusoidal flow rates for a range of Reynolds number, Re , and Strouhal number, St. The results show that even for relatively low frequency flows a strong vortex wave will be generated with a complex wall shear stress distribution and peak values much greater than those found in steady or unsteady parallel flow. The vortex wave increases in strength with increasing Re and St , with its total length and wavelength independent of Re but inversely proportional to St. The form of the imposed flow rate is found to have an important effect on the flow and the shear stress distribution.

Copyright © 1992 by The American Society of Mechanical Engineers
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