Instability in three-dimensional, unsteady, stenotic flows

Francois Mallinger, Dimitris Drikakis

Research output: Contribution to journalArticlepeer-review


The paper presents a computational investigation of instabilities in pulsatile flow through a three-dimensional stenosis. The computations have been conducted using a third-order high-resolution scheme and a non-linear multigrid algorithm. The simulations reveal the existence of unstable flow throughout the pulsatile cycle. The instability is manifested by asymmetric flow patterns - though the stenosis is axisymmetric-large flow variations in the cross-sectional planes, and swirling motion in the poststenotic region. The instability leads to a strongly disturbed flow several radii downstream of the stenosis, as well as spatio-temporal fluctuations of the circumferential shear stress and vorticity.

Original languageEnglish
Pages (from-to)657-663
Number of pages7
JournalInternational Journal of Heat and Fluid Flow
Issue number5
Publication statusPublished - Oct 2002


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