Numerical Study of the Behaviour of Wall Shear Stress in Pulsatile Stenotic Flows

Ooi, A., Blackburn, H. M., Zhu, S., Lui , E. and Tae, W. (2007). Numerical Study of the Behaviour of Wall Shear Stress in Pulsatile Stenotic Flows. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (82-86). 3-7 December, 2007.

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Author Ooi, A.
Blackburn, H. M.
Zhu, S.
Lui , E.
Tae, W.
Title of paper Numerical Study of the Behaviour of Wall Shear Stress in Pulsatile Stenotic Flows
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Start page 82
End page 86
Total pages 5
Collection year 2007
Language eng
Abstract/Summary This paper presents a numerical study of pulsatile flow through an axisymmetric stenosed artery. Numerical calculations of the incompressible Navier-Stokes equations were carried out in an axisymmetric geometry to investigate how the wall shear stress (WSS) is affected by varying levels of stenosis contractions and pulse periods (reduced velocity). It is found that the distribution and strength of the WSS is closely correlated with the position of the vortex ring formed at the stenosis. Each vortex ring generates high WSS at the stenosis walls and this high WSS propagate downstream with the vortex ring. As the vortex ring convects downstream, it loses its strength due to viscous effects and WSS decreases in magnitude. In general, the strength of the vortex ring increases with increasing stenosis levels which leads to higher WSS values on the walls. The effect of smaller pulse period is to reduce the distance between the vortex rings, thus increasing the spatial variation of WSS along the stenosed artery.
Subjects 320601 Human Biophysics
320699 Medical Physiology not elsewhere classified
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Tue, 18 Dec 2007, 12:34:08 EST by Laura McTaggart on behalf of School of Engineering