Instability in three-dimensional, unsteady, stenotic flows

Francois Mallinger, Dimitris Drikakis

Research output: Contribution to journalArticle

63 Citations (Scopus)


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 - 1 Oct 2002


  • stenotic flows
  • three-dimensional stenosis
  • instabilities


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