TY - JOUR
T1 - Effect of geometry of stenosis on the computation of flow characteristics of unsteady blood flow in a collapsible vessel
AU - Tang, Aik Ying
AU - Noor, Mohd Al Akhbar Mohd
AU - Mohd Yassin, Airil Yasreen
AU - Amin, Norsarahaida Saidina
AU - Abd Nazir, Mohd Zhafri Jamil
N1 - Funding Information:
The authors owe much to the helpful suggestions and guidance of Professor John Ockendon of Oxford University at various stages of the work. The third author likes to thank Professor Abdul Rashid Abd Aziz and Dr Mohamed Latheef for the fruitful discussions he had at Universiti Teknologi PETRONAS.
Publisher Copyright:
© 2021 Penerbit UTM Press. All rights reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - This paper discusses the effect of different geometric representations of stenosis on the numerical solution of one-dimensional unsteady blood flow in stenotic blood vessel (or stenosis) taking into account fluid-structure interaction. In the formulation, a collapsible pressure-area constitutive relation is added to the coupled mass and momentum equations to allow for the interaction between the cross sectional area, volumetric flow rate and pressure of the flow and hence the prevalence of the one-dimensional fluid-structure interaction. The formulation is stabilized by employing Streamline-Upwind Petrov-Galerkin scheme. Non-reflecting boundary conditions are imposed based on the method of characteristics. Flow characteristics and the geometrical effects of the stenosis are then discussed. Numerical results show that stenosis with irregular shape is more prone to collapse as compared to the smooth one for a given baseline conditions. This study, thus, highlights the importance of representing the shape of the stenosis as close as possible as it might give information otherwise missing in the simplistic smooth representation of the stenosis.
AB - This paper discusses the effect of different geometric representations of stenosis on the numerical solution of one-dimensional unsteady blood flow in stenotic blood vessel (or stenosis) taking into account fluid-structure interaction. In the formulation, a collapsible pressure-area constitutive relation is added to the coupled mass and momentum equations to allow for the interaction between the cross sectional area, volumetric flow rate and pressure of the flow and hence the prevalence of the one-dimensional fluid-structure interaction. The formulation is stabilized by employing Streamline-Upwind Petrov-Galerkin scheme. Non-reflecting boundary conditions are imposed based on the method of characteristics. Flow characteristics and the geometrical effects of the stenosis are then discussed. Numerical results show that stenosis with irregular shape is more prone to collapse as compared to the smooth one for a given baseline conditions. This study, thus, highlights the importance of representing the shape of the stenosis as close as possible as it might give information otherwise missing in the simplistic smooth representation of the stenosis.
KW - Blood flow
KW - Fluid-structure interaction
KW - Stenosis
KW - Streamline-upwind Petrov-Galerkin
KW - Vessel collapse
UR - http://www.scopus.com/inward/record.url?scp=85102692390&partnerID=8YFLogxK
U2 - 10.11113/jurnalteknologi.v83.13865
DO - 10.11113/jurnalteknologi.v83.13865
M3 - Article
AN - SCOPUS:85102692390
SN - 0127-9696
VL - 83
SP - 15
EP - 25
JO - Jurnal Teknologi
JF - Jurnal Teknologi
IS - 2
ER -