TY - JOUR
T1 - Instability in three-dimensional, unsteady, stenotic flows
AU - Mallinger, Francois
AU - Drikakis, Dimitris
N1 - Funding Information:
The financial support from EPSRC (GR/L71568) is gratefully acknowledged. We would also like to thank M. Leschziner and the anonymous reviewers for their comments on the manuscript.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/10
Y1 - 2002/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0036779261&partnerID=8YFLogxK
U2 - 10.1016/S0142-727X(02)00161-3
DO - 10.1016/S0142-727X(02)00161-3
M3 - Article
AN - SCOPUS:0036779261
SN - 0142-727X
VL - 23
SP - 657
EP - 663
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
IS - 5
ER -